Demonic Sorcerer Help

Fellow Vaulthunters,
I need some help with a Lvl 45 Demonic Sorcerer (Boss in Tiny Tina’s DLC).
I’m overwhelmed by all the enemies.
I’m using a lvl 43 Commando with a level 38 Bee shield (No legendary weapons)
I’ve already lost $1.5 MILLION to this ass-clown.
PSN: bighunt15

Any help would be appreciated.