[Snake]

I 'think' a better choice could be making their SWA usage raised by 6%, 7% and 8% per rank, starting at 100%. (Chaser/Rising Tide/Elemental Rave, respectively).
I never understood why a skill that links up the rest of the Reaver Combo should have the biggest damage, when Elemental Rave is something that can be reduced multiple times, resisted if done airborne and feed Voltiger. That's why I think it should have the highest scaling of them all.

I wouldn't mind these Stance bonuses being 15 instead of 30 either. A 30 could be if you are running Demon Hunter/Demon Hunter, maybe?

Reaver granting bonus power is boring in my opinion, not when most of their skills are going to be meeting head on with an enemy's Greenscale Tunic to sap twice as much FP/Evasion for -30% damage. I'd rather the stance grant them a fat bonus to hit, if only for Evasion purposes only. Or if the enemy is airborne.

Combination Fighter, as stated in the other thread running on about, could use what Slydria said, lesser damage reduction. Or maybe also an FP reduction too, along the lines. And about Wild Ride, it could also be affected by Combination Fighter, so it gets its momentum reduced too? Combination Fighter could also affect Descending Uroboros and Retaliate.
Or maybe all Demon Hunter offensive skills for the hell of it. More combos = more fun.

I kind of like Chaos's idea of Cobra changing movement to teleport, but I still believe the Evade should be passive while the stance is active, or maybe you only get an extra 15 Evade after performing a teleport. (assuming Cobra's granted Evade is 15 now, after Slydria's point) Also like Desperado Stance's idea too, but I would reduce that by half, or hard cap at two rounds, for multi-shot.

I don't like the idea of Matador getting more Rage Energy because it would just help people nuke physical attackers and cut their maximum HP by a large amount with Cursed Wounds for only being damaged. It would be a big chore if you've gone against a full tank build that can heal themselves and spam back most the damage you do back at them. Just giving a bonus to Critical Evade, as stated, might be enough.