I too was amazed by what he can do in the gunner LOLX.
I robbed 6 maxed holy talismans off my CR (ofc Paladin is the better choice for him,but i don't have any).
Using red bat i first applied Smite and then in the same round,after getting rid of the underlings used the fury attack on the boss for 6x8967 damage...a useful assasin Eddie at last! (i feel sorry for people who invested into the rainmaker)
Even the randomness can be easily coordinated (to a certain degree ofc) by using the right move order...