That looks very useful, many thanks 
Is there a grenade mod that works best with bloodsplosion?
I prefer the fastball, dropped by Boll. I think my OP8 fastballs deal about 27,000,000 in damage with one hit, which typically kills lessor opponents and the unused portion of the 27mm damage is then bloodsploded amongst his buddies.
A low level slag grenade like the crossfire ir bouncing bonny/betty? Works best , because they’ll slag the enemies without damaging you.
As far as setting it up goes anyway.
Followed by a fastball it would be pretty brutal!
If you want to bloodsplode with the grenade, then the Fastball is definitely for you.
Here is a nice guide on building Krieg around it :
If you want a grenade to help getting good Bloodsplosions, then use a Slag Bouncing Betty and run Melee.
By the way, Melee Krieg will deal more Damage through Bloodsplosion than Explosive Krieg.
Melee/explosive bloodsplosion krieg is what I’ve always run. Practice practice practice with aiming your fastballs. I once, completely accidentally, bloodsploded the handsome dragon.