Help with farming Hyperius the Invinicible - Level 70 UVHM

Borderlands: The Handsome Collection [XBOX ONE] BHC Multiplayer/CO-OP and Trading Post
#1

Im a level 70 Siren playing on UVHM. Need help farming seraph crystals from Hyperius. GT - Visaraion

#2

Hi, have a op8 axton if you need a hand, obviously means he will scale too 72 (hope this ain’t no problem)