I'm testing with a variety of gear sets right now. From what I've extrapolated so far, there's a lot of disparity between what stat weights say and what reforge plots show.
For reference, in simple terms:
- Stat weights are what happens when you add/remove an amount of the stat without changing any other gear. Obviously this is somewhat unrealistic, unless you're talking about adding gems/enchants/food.
- Reforge plots shows the relationship between dropping one stat for another. For example, what happens when you trade Mastery for Haste and vise-versa. This is more realistic in terms of changing pieces of gear which have different stats. Note this only compares the two secondary stats in question, so it doesn't take into account one item being a higher ilvl than the other.
Between 15 and 25% Haste (on gear, not including trinket), Haste and Mastery are pretty dynamic and need to be balanced.
As you can see, going in either direction results in minor gains followed by major losses. This doesn't mean either stat is bad, it simply means that you don't want to give up large amounts of one for the other, the key is balance. In short: Stat weights lie.
This is an issue, as simply looking at stat weights will make you think that one is significantly better than the other, but as soon as you make that change, the relationship will reverse. This makes them effectively equal, as dropping one is always going to make the other better, but the kicker is that the highs and lows are within <1k DPS of each other (that's ~0.5%), so it really isn't worth trying to min/max, I don't care how "I wanna be best" you think it'll make you.
Haste is still almost always better than Crit though, so it doesn't mean you should stop getting haste, you just shouldn't trade Haste for Mastery or Mastery for Haste between those two values.
So the guidelines I'm going to stick with are (assuming any level of class trinket, but not including haste gained from it):
Haste to ~18% > Mastery = Haste to 25% > Crit to 30% > Vers > Crit beyond 30% > Haste beyond 25%
There are probably future soft caps for Haste and Crit, but they're unfeasible due to gear limitations, to include foreseeable Legion content.
Remember what I wrote above about stat weights though; they lie. If you have Haste and Crit at 18%, you might see Crit weighted higher than Haste, but that doesn't mean you should drop Haste to get more of it. In reality, the relationship probably looks something like this:
Too much reading, just tell me what to do!
- Haste to 18%, then focus on Mastery and Crit (to 30%), and letting your Haste increase along the way.
- If you're already beyond those points, which most Mythic geared players currently are, continue pushing Mastery and Haste. Once Haste is up to 25%, look for more Mastery and Versatility.
- When analyzing these plots and assessing changes, remember that minor gains/losses are just that: minor. The nice thing about these convoluted relationships with our stats is that just about everything is good, so in practice, ilvl is the biggest determining factor.