Nexus Clash

Consider Way of the Whirlwind "aura" an attack, with a chance to miss and with all bonuses and detriments to normally attacking. This would include combo attaco, as well as any prayer, buff or whatever.
This should not incur on an AP cost, nor trigger retaliation nor Way of Whirlwind from the opponent (to prevent an infinite loop), and possibly ignore other auras.

Hm. I don't wholeheartedly object to the idea that two ES attacking each other get locked into a death spiral.

Otherwise, it seems like a decent way of differentiating whirlwind from other auras, aside from potentially making it extraordinarily strong (I'm sure you could stack up ~+15 damage in a good faction at 100%+ accuracy).