Seven Force
Banned
Final boss is very hard on Crit. His main attacks do an absurd amount of damage. I took him about by not allowing him to have a second phase. The Wayfinder sequence allows you to unload all your attacks for a good bit.
I recorded my winning attempt: https://www.youtube.com/watch?v=uibQXUrJZfc
Yeah, this is exactly how I did it. Got him to half health with Spellweaver/Fire,Blizzard & Thunda-ja, activated the Wayfinder sequence and unloaded on him with Shotlocks, using elixrs to replenish the focus bar. By the time the second phase started, I only had to cast Blizzard to finish it.
The fight is still ass, even with the tweaks to the boss and Critical as a whole being re-balanced, but at least there's a way around that abysmal last phase.