Critical Damage Increase for Vipers!?

Yeah, I checked my stunned barrage dmg too when I saw Shikage posted the dmg difference in Jms. My stunned barrage can hit upto 14xk now.. mw 20 and Warrir elixer. It makes no sense though, we already ohko pretty much everything on here, what point is getting even higher Stun dmg.. I want un stun-required crit, dammit!

EDIT: Btw it's still just +60% I hit about 90k without stun, so my technical max should be 145k on prestun, no +160% dmg.