Quite fun! I did a Possessed Strength build on my first playthrough, and it was good enough to beat the game. Momentum is an extremely powerful mechanic, especially when combined with Impact. I found the 'big damage at a cost' cards to be pretty underwhelming-- a single possessed strength lets me use shoulder bash et al for 11 damage, while all-in strike et all seem to aim for 20-40 damage in exchange for leaving you at or near 1 hp. Considering the abundance of ranged enemies and the limited availability of movement options, not to mention every boss becoming invincible, teleporting, and dealing fixed damage to the player at set intervals, I just can't see those cards ever really being the backbone of a strategy. Pristine Strike, which wants you to keep your health at max, seems much better since if you end up taking damage only that part of your build is temporarily offline and you still have an opportunity to recover, whereas the other option results in your death. Regardless, after two to three possessed strengths Tactical Bash is basically the best card in the game, giving you actions, cards, and massive damage potential.