If you can get into a flanking position, I think you'll find Torturous Strike to be the more damaging option.  1d20+18 for the attack roll, and then 2d6+12+2d6+3 for damage.<br/><br/>Riposte Strike is the sort of thing you want to save for when you're flanking with Damian and he's just put the enemy into that double-lockdown of his where they take damage if they attack him and damage if they don't.  It'll encourage them to attack him instead of you, since they'll take more for hitting you than hitting him, and he'll have enough AC buffs that they'll probably miss.