PoE builds similar to 3.16 = Chieftain = Cyclone Ngamahu's Flame

My build is basically a maxed out version of RueToo's crit splitting steel build. I have the 2 empty jewel sockets ready to go just not sure what I want to allocate. I feel like the build does enough damage and I'd like more beef, I am thinking Brutal Fervour for the insane leech and damage reduction while leeching. Ideas? &x200B;

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