I do exactly this or some time pre-cast PB >RoP +Comb>PF(+FB if PB did not crit) and so on...
I really hope that what keep me from "shining" is that I lack the crit stacking trait in the artifact, because atm with 46% crit at 826 ilvl the best I could do in a static fight and with some luck out of combustion was 206k DPS, in the same Dung I was behind a Destro Lock in every other fight.
For sure I lack confidence with the class and with caster in general, used to be Fury the last 2 expansions. But I feel mid of the pack right now