econ21 wrote:The interesting part of the BiS gear set question to me is what happens to a gear guide premised on stacking mastery when you get to the point where mastery has no value? My tentative answer is that the gear guide may still be fine: mastery heavy items may still BiS even after CTC cap if you were wanting to stack stamina and as good as double avoidance if you want to stack avoidance. This is because mastery is not useless after CTC cap - it allows you to gem/trinket for stamina and/or reforge to avoidance (most of us are not at the point where we have so much mastery we can't reforge it). This argument is counter-intuitive but seems logical; I would be interested in other people's thoughts on it.
Once you've enough mastery on your gear that you're able to reach CTC cap, it becomes a question of what you want next, but generally max ilevel you can get while still maintaining CTC cap is a safe bet. Obviously wearing 391 parry/hit in all slots won't let you hit CTC cap, but that gear doesn't exist, and there's enough 391 mastery slots that as long as you have those you have enough itemisation to hit CTC cap with ease. After that point you can opt to reforge for a couple % more avoidance or at least soft exp cap and a few % hit. Given that tank survival is a lot more CD oriented than raw gear on most encounters in Firelands, I'd personally go with a soft exp setup for most fights, and honestly the extra couple of % avoidance you squeeze out by not picking up a few threat stats is fairly inconsequential in most fights this tier.
TL;DR, once you pass a certain ilvl, I'd say around 380 with access to revered mastery trink or spindersilk spindle, gearing becomes pretty simplistic - higher ilvl's generally better. There's a couple of interesting choices around that ilevel - going for 4 piece whilst maintaining ctc cap isn't trivial unless you've got some other nice mastery pieces (hi shannox belt, looking at you!) for example, but generally the choice boils down to roughly, 15% dodge, 17.5% parry with negligible threat stats or 12% dodge, 15% parry with at least 26 exp and ~6% hit, or somewhere in the middle, and you just tweak your max ilevel gear setup towards either direction through the joys of reforging.