Furthermore, 6.67 RPS assumes you're only hitting Sblock... but good tanks don't ONLY hit they, they also need to be hitting sbar and doing other various things and so what if you have so much extra rage you can sneak in a heroic strike or something. Or if you REALLY need to reduce a lot of damage you can sblock and sbar. (I think that works, right? Absorbs come after blocks I'm pretty sure). I can dump a lot of rage as a prot warrior, I have no idea why more than 6.67 rps should be considered a soft cap. Get that hit/expertise!