Si Branch Gregor is a crit-based Poise and Rupture identity that fixes its own consistency problems. He builds Poise every turn, keeps Serpent Arm refreshed through his crits, and his single-coin skill 3 clashes like an E.G.O skill. Popping Deathrite -Venom- adds a big burst of bonus damage.
How to play
Open with the defense skill once to gain Serpent Arm, then rarely use it again. Build Poise to 20 for guaranteed crits and clash power, then to 30 so skill 2 can reuse a coin. Skills 1 and 2 keep your Poise Count topped up, and skill 2 or 3 refresh Serpent Arm on crits. Use skill 3 as the nuke once Poise is high, since it strips Deathrite -Venom- and detonates it.