FontConfig setup~/.config/fontconfig/fonts.conf

fonts.conf

<?xml version='1.0'?>
<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
<fontconfig>
    <match target="font" >
        <edit mode="assign" name="autohint">  <bool>false</bool></edit>
        <edit mode="assign" name="hinting">   <bool>true</bool></edit>
        <edit mode="assign" name="hintstyle"> <const>hintfull</const></edit>
        <edit mode="assign" name="antialias"> <bool>true</bool></edit>
        <edit mode="assign" name="rgba">      <const>rgb</const></edit>
        <edit mode="assign" name="lcdfilter"> <const>lcdlight</const></edit>
    </match>

    <!-- smaller than 9px -->
    <match target="font">
        <test name="pixelsize" qual="any" compare="less"><double>9</double></test>
        <edit mode="assign" name="antialias"> <bool>false</bool></edit>
    </match>

    <!-- the below are noops for now -->

    <!-- bigger than 15px -->
    <match target="font">
        <test name="pixelsize" qual="any" compare="more"><double>15</double></test>
        <edit mode="assign" name="hintstyle"><const>hintfull</const></edit>
        <edit mode="assign" name="lcdfilter"><const>lcdlight</const></edit>
    </match>

    <!-- Bold fonts -->
    <match target="font">
        <test name="weight" compare="more"><const>medium</const></test>
        <edit mode="assign" name="hintstyle"><const>hintfull</const></edit>
        <edit mode="assign" name="lcdfilter"><const>lcdlight</const></edit>
    </match>

    <!-- Italic fonts -->
    <match target="font">
        <test name="slant"  compare="not_eq"><double>0</double></test>
        <edit mode="assign" name="hintstyle"><const>hintfull</const></edit>
        <edit mode="assign" name="lcdfilter"><const>lcdlight</const></edit>
    </match>
    <alias>
       <family>sans-serif</family>
       <prefer>
         <family>DejaVu Sans</family>
       </prefer>
    </alias>
    <alias>
       <family>serif</family>
       <prefer>
         <family>DejaVu Serif</family>
       </prefer>
    </alias>
    <alias>
       <family>monospace</family>
       <prefer>
         <family>DejaVu Sans Mono</family>
       </prefer>
    </alias>
    <alias>
        <family>Arial</family>
        <prefer>
            <family>DejaVu Sans</family>
        </prefer>
    </alias>
</fontconfig>