what do you do with krennic?

nothing?

You could blow one more relic level on him after you unlock SEE so the Rancor doesn’t get tired of a steady diet of Roses...

(Seriously though, with Death Trooper getting updated to the Imperial Remnant tag, Krennic is very much left out in the cold...)

You can make a squad with him and other semi-worthless empire toons so at least, they can "appear" to be useful in your squad list?

Definitely useful for the DR counter. As long as his speed boost to Vader's unique doesn't make Vader faster than DR.

Weapon Tech to Vader.
Pre-taunt and leader eat Fear.
Merciless on Vader, Crush, throw at DR.
Cleanup.

You can slot him in with Gideon, DT, Storm, Dark Trooper.

if im relicing someone there getting used simple as that.

no he hasta beat reven

I don't think I have ever gone against a player that used Krenic for anything in the 5 years I had the game (minus 1.5 years off)

I only use him in 3v3. 5v5 he isn't used at all

cRancor food?