well they all have bows (skeletons are my test subject)
it attempts to equip a chestplate to them, and if it fails, they get sent to the pit. if they equip the chestplate, they get to ride the waterstream away
had an idea to build a redstone machine that sorts zombies and skeletons based on if they have the CanPickUpLoot attribute because uhhh i can. it is ugly yet functional