TheManta

int radius = 30;

var targets = GameObjectManager.GetObjectsOfType<BattleCharacter>()
    .Where(bc => bc.IsTargetable && bc.CanAttack)
    .GroupBy(bc => bc.NpcId)
    .Select(group => group.FirstOrDefault());

if(targets.Any())
{
    var location = targets.Select(bc => bc.Location)