PoE The_Doser builds

So thank you to those who recommended going with Splitting Steel, going really well. My question is, beyond swapping my 2nd ring out, gaining a level to utilise a "That Which Was Taken" jewel (chance to gain power charge + crit chance with max charges, got a spare point in large cluster to move), to then change my charms around for some impales ones... Would that be as far as it would be worth it to min-max? I've only got around 30 divs leftover, so the choice is to save for the upgrades if worth it, or save all upcoming divs for a new PF FR build. It seems if I go the Forbidden Flame/Fl