another idea for bosses that smeru and I discussed in the survival chat in the discord
it would be cool if custom bosses had tiers if they were added, like you can craft a tier 1 summon from normal vanilla items and then that tier 1 boss has a 100% drop chance for an item you make to summon the 2nd tier, and so on
it could be more entertaining to have tiered bosses, though it could be tedious to farm