Originally Posted by
paraalso
We can store a large amount of EB charges, but we can't store an infinite amount of chi. Assuming tank swaps aren't too far apart, we get 100% of the crit benefit stored even when not tanking the boss. We won't get 100% of the haste benefit stored, because chi can't be stored (beyond 4) and shuffle is always running down.
In a fight where the boss is hitting us 50% of the time, we may have a very high uptime on shuffle even without heavy haste focus thanks to stacking it when offtanking. So increased haste will not have as big of an impact as if we are tanking 100% of the time. When the boss does heavy predictable burst rarely, we'll have 100% shuffle uptime during burst whether we have 0 haste or lot of haste. The less haste tank mostly has to sacrifice mitigation during the non-burst times. Haste can still be very good though.
I generally see focusing on hit, expertise, haste and crit roughly in that order as our best bet. I don't see dodge or parry as valuable as any of those four stats, which is a little funny considering they are the actual tanking stats. Stamina and agility are very good too, but you only have to choose between secondary and primary stats with gems and trinkets. For trinkets we'll probably want to focus on agility and stamina, as 1 agility/1.5 stamina is still better than 1 of any secondary stat. Going for secondary stat gems is viable due to the double budget.