Thanks everyone for answers

Also lol wut mechanized destroyer has a special drop? Is it better or worse than Gryphon's diadem for a javazon?.

Anyways, hopefully the last question for now:

How hard is Cthulhu? What type of attacks he uses and how much dmg is needed to kill him (I hit mappo for around 20-35% of his hp before he heals once, is this enough damage?, can't kill crucible chimera yet which was a very easy boss last patch so kinda worried).