PoE Splitting Steel builds with custom stat filters

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

Hey all, so far this league has been crazy, especially with the new league mechanic, I've been able to juice like crazy. First time running splitting steel and was wondering what the final things I can do for the build, or if would it be worthwhile to start a new one. I could roll better implicit on gear, and probs use better charms but then I'd be investing heavily and the reward ratio isn't the the highest. Any advice?