Flamblast Gemling Swap

Folks that played Flameblast on Gemling, what did you swap to and how much better do you like it?

I've got this character pretty tanky and damage is absurd but mother of Christ the annoyance I have with oil grenade is immeasurable.

I have about 1-2k divs in gear + 1k raw divines to swap. Even willing to go second char if necessary.

Looking for something comparable in tankiness and damage but without the headache.