My dg7.module implementation of hook_form_islandora_multi_importer_form_alter to select usual option defaults.

My Implementation of hook_form_islandora_multi_importer_form_alter

/**
 * Implements hook_form_FORM_ID_alter.
 *
 * This function implements hook_form_FORM_ID_alter where FORM_ID is 'islandora_multi_importer_form` with intent
 *   to set #default_value option selections to the usual defaults required for ingest of new objects using
 *   TWIG template "Digital_Grinnell_MODS_Master.twig Revision 14".
 *
 * @param $form
 * @param $form_state
 * @param $form_id
 */
function dg7_form_islandora_multi_importer_form_alter(&$form, &$form_state, $form_id) {
  global $user;

  // Attention!  Update $mods_template here to the name given to the current DG MODS Master TWIG.
  $mods_template_name = "Digital_Grinnell_MODS_Master.twig Revision 14";

  // Define some arrays for frequent re-use.
  $default_XSLT = array('default XSLT' => 'xslt|0');
  $mods_template = array($mods_template_name => 'template|'.$mods_template_name);
  $build_derivative_from_OBJ = array('Build using derivative from OBJ' => 'derivative|0');
  $build_using_islandora_derivative = array('Build using islandora generated derivative' => 'derivative|0');
  $build_derivative_from_PHOTO = array('Build using derivative from PHOTO' => 'derivative|0');
  $obj = array('OBJ' => 'column|6');
  $transcript = array('TRANSCRIPT' => 'column|7');
  $thumbnail = array('TN' => 'column|8');
  $workspace = array('WORKSPACE' => 'column|1');  // this column is generally EMPTY

  // Use these to dump form data structures.
  // p($form_id);
  // p($form_state);
  // p($form);

  // Always choose the current DG MODS Master TWIG template
  $form['step4']['group_tabs']['group_twig_tab']['savemenu']['template_chooser']['template_list']['#default_value'] = $mods_template;

  // Always find the object's CModel in the 'cmodel' column, #4
  $form['cmodelmap']['basemapping']['rows']['cmodelmap_row']['cmodelmap']['#default_value'] = array('cmodel' => '4');

  // For compoundCModel...
  $cm = 'islandora:compoundCModel';
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['DC']['method']['data']['#default_value'] = $default_XSLT;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['MODS']['method']['data']['#default_value'] = $mods_template;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['TN']['method']['data']['#default_value'] = $thumbnail;

  // For sp_large_image_cmodel...
  $cm = 'islandora:sp_large_image_cmodel';
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['DC']['method']['data']['#default_value'] = $default_XSLT;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['MODS']['method']['data']['#default_value'] = $mods_template;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['OBJ']['method']['data']['#default_value'] = $obj;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['TN']['method']['data']['#default_value'] = $build_derivative_from_OBJ;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['JPG']['method']['data']['#default_value'] = $build_derivative_from_OBJ;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['JP2']['method']['data']['#default_value'] = $build_derivative_from_OBJ;

  // For sp_pdf...
  $cm = 'islandora:sp_pdf';
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['DC']['method']['data']['#default_value'] = $default_XSLT;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['MODS']['method']['data']['#default_value'] = $mods_template;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['OBJ']['method']['data']['#default_value'] = $obj;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['PDFA']['method']['data']['#default_value'] = $workspace;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['TN']['method']['data']['#default_value'] = $build_derivative_from_OBJ;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['FULL_TEXT']['method']['data']['#default_value'] = $build_derivative_from_OBJ;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['PREVIEW']['method']['data']['#default_value'] = $build_derivative_from_OBJ;

  // For binaryObjectCModel...
  $cm = 'islandora:binaryObjectCModel';
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['MODS']['method']['data']['#default_value'] = $mods_template;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['OBJ']['method']['data']['#default_value'] = $obj;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['TN']['method']['data']['#default_value'] = $build_derivative_from_OBJ;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['TN']['method']['data']['#default_value'] = $thumbnail;

  // For sp_basic_image...
  $cm = 'islandora:sp_basic_image';
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['DC']['method']['data']['#default_value'] = $default_XSLT;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['MODS']['method']['data']['#default_value'] = $mods_template;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['OBJ']['method']['data']['#default_value'] = $obj;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['TN']['method']['data']['#default_value'] = $build_derivative_from_OBJ;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['MEDIUM_SIZE']['method']['data']['#default_value'] = $build_derivative_from_OBJ;

  // For oralhistoriesCModel...
  $cm = 'islandora:oralhistoriesCModel';
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['DC']['method']['data']['#default_value'] = $default_XSLT;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['MODS']['method']['data']['#default_value'] = $mods_template;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['OBJ']['method']['data']['#default_value'] = $obj;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['TRANSCRIPT']['method']['data']['#default_value'] = $transcript;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['TN']['method']['data']['#default_value'] = $thumbnail;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['OGG']['method']['data']['#default_value'] = $workspace;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['MKV']['method']['data']['#default_value'] = $workspace;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['TECHMD_FITS']['method']['data']['#default_value'] = $workspace;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['MP4']['method']['data']['#default_value'] = $workspace;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['PROXY_MP3']['method']['data']['#default_value'] = $workspace;

  // For sp_videoCModel...
  $cm = 'islandora:sp_videoCModel';
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['DC']['method']['data']['#default_value'] = $default_XSLT;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['MODS']['method']['data']['#default_value'] = $mods_template;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['OBJ']['method']['data']['#default_value'] = $obj;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['TN']['method']['data']['#default_value'] = $thumbnail;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['OGG']['method']['data']['#default_value'] = $workspace;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['MKV']['method']['data']['#default_value'] = $workspace;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['TECHMD_FITS']['method']['data']['#default_value'] = $workspace;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['MP4']['method']['data']['#default_value'] = $build_derivative_from_OBJ;

  // For sp-audioCModel...
  $cm = 'islandora:sp-audioCModel';
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['DC']['method']['data']['#default_value'] = $default_XSLT;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['MODS']['method']['data']['#default_value'] = $mods_template;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['OBJ']['method']['data']['#default_value'] = $obj;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['TN']['method']['data']['#default_value'] = $thumbnail;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['PROXY_MP3']['method']['data']['#default_value'] = $build_derivative_from_OBJ;

  // For bookCModel...
  $cm = 'islandora:bookCModel';
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['DC']['method']['data']['#default_value'] = $default_XSLT;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['MODS']['method']['data']['#default_value'] = $mods_template;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['TN']['method']['data']['#default_value'] = $thumbnail;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['PDF']['method']['data']['#default_value'] = $build_using_islandora_derivative;

  // For pageCModel...
  $cm = 'islandora:pageCModel';
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['DC']['method']['data']['#default_value'] = $default_XSLT;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['MODS']['method']['data']['#default_value'] = $mods_template;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['TN']['method']['data']['#default_value'] = $build_derivative_from_OBJ;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['JP2']['method']['data']['#default_value'] = $build_derivative_from_OBJ;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['JPG']['method']['data']['#default_value'] = $build_derivative_from_OBJ;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['OCR']['method']['data']['#default_value'] = $build_derivative_from_OBJ;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['HOCR']['method']['data']['#default_value'] = $build_derivative_from_OBJ;

  // For collectionCModel...
  $cm = 'islandora:collectionCModel';
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['DC']['method']['data']['#default_value'] = $default_XSLT;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['TN']['method']['data']['#default_value'] = $thumbnail;

  // For sp_disk_image...
  $cm = 'islandora:sp_disk_image';
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['DC']['method']['data']['#default_value'] = $default_XSLT;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['MODS']['method']['data']['#default_value'] = $mods_template;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['OBJ']['method']['data']['#default_value'] = $obj;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['TECHMD_DFXML']['method']['data']['#default_value'] = $build_derivative_from_OBJ;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['PHOTO']['method']['data']['#default_value'] = $thumbnail;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['JPG']['method']['data']['#default_value'] = $build_derivative_from_PHOTO;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['TN']['method']['data']['#default_value'] = $build_derivative_from_PHOTO;

  // For sp_web_archive...
  $cm = 'islandora:sp_web_archive';
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['DC']['method']['data']['#default_value'] = $default_XSLT;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['MODS']['method']['data']['#default_value'] = $mods_template;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['OBJ']['method']['data']['#default_value'] = $obj;

  // For newspaperCModel...
  $cm = 'islandora:newspaperCModel';
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['DC']['method']['data']['#default_value'] = $default_XSLT;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['MODS']['method']['data']['#default_value'] = $mods_template;
  $form['cmodelmap']['cmodels'][$cm]['dsid']['rows']['TN']['method']['data']['#default_value'] = $thumbnail;

  // Finally, the 'objectmap' portion of the form...
  $form['objectmap']['objectmapping']['rows']['parentmap_row']['parentmap']['#default_value'] = array('parent' => '3');
  $form['objectmap']['objectmapping']['rows']['labelmap_row']['labelmap']['#default_value'] = array('title' => '9');
  $form['objectmap']['objectmapping']['rows']['sequencemap_row']['sequencemap']['#default_value'] = array('sequence' => '5');
  $form['objectmap']['objectmapping']['rows']['dsmap_row']['dsremote']['#default_value'] = array('local*' => 'LOCAL');

  return;

  }