Originally Posted by
Dracodraco
1: You can never have "enough crit" to create "enough DAs". More is always better. It's better coverage, it's better sustained throughput, it's more DPS.
2: You will end up with more than enough mastery even if you go full crit-focus to be "balanced", as you require less mastery than crit to reach a percentage point.
3: It might be good on Garrosh in 10 man, but in 25 man, Spirit shell is borderline useless on every fight but Paragons for soaking AIM, and apart from that, as a throughput cooldown (EG ensuring zero overhealing while AOE healing).
It can't be underestimated when there's nothing to estimate, really - you trade 10% haste and 3.5k mastery on a 16% uptime (at best, more like 10% in reality due to saving SS for correct time to use it), vs the higher crit you could get with non-tier pieces, and the extra int / stats overall you can get with warforged.