Wasn't sure whether to put this in suggestions or arsenal. But i'm gonna give priority to it being a weapon discussion and put it here.
I think a nice addition to the bombers arsenal would be a turret destroying bomb. It would one-shot turrets/polyps/howlitzers. It would go a long ways to making solo bombing more viable, as well as make a bomb(er) really handy in a party. Most bombs just become a slower way to kill mobs in 4 person parties. The vortex are the only bomb that can really expedite the killing of mobs in parties. Shock/fire/poison can be nice, but in a party of strong players it just makes fights take longer than they would to pull out a sword and DPS. Blast bombs just kinda suck most the time for parties. Dark Retribution's only place is versus Royal Jelly aka Jelly King. Therefore, dedicating 1 of your precious weapon slots to a bomb just for turrets and had a function in solo or party play would be nice.
It would need a small blast area or it might OP.
Or perhaps it could do multiple blasts with knockback so that it would kill stationary objects but only damage mobile enemies with one blast.