Currently Infinity - Deep Thought till 150 in mind gem for the +1 stat then 6 fighting/end for the +1 in those categories.  After those take Temporal Loophole till 150 in time gem for the +1.  Next up is Strike Through to 75.

For Terminal Bounty farming substitute Canadian Devil for Stabby Flip and swap back for the boss.

Rotation is Hold down Bang Boom > Hulk Hand Arrow > Bang Boom Pow > Real Armor Buster > Stabby Flip > Kaboom! > Bodyslide to safe distance, can tap it in the last .5 seconds of Kaboom! animation and as soon as the animation finishes you'll port to safety.  Server Lag on Cooldown- bonus points if you interrupt boss mechanics with it like Jugg charge or Magneto signature.  Blast Bang Bang until the rotation comes off cooldown and do it again.

The nice part about this skill setup is it's very safe if your timing is good, can use Stabby Flip to hop behind boss animations and Bodyslide to dodge otherwise.

Proper write-up will come as I continue to test and update. 

Recent changes :

Swapped endurance bonuses to fighting on slots 1-5

His personal slot 2 unique tested higher than X Uniform with current gear so swapped to that.