The devastator and hyperius help

Is it possible to get the devastator from the seraph guy in oasis or does it have to drop from one of hyperius or master gee on UVHM?
Does anybody have any tips for killing hyperius because I can’t for the life of me do it I’m at level 72 no OP levels.

hey dude i could help u with hyperius, are u playing rn?

Yeah my GT is The AfroNinja27