Originally Posted by
Kisho
It says it 'converts' all of your secondary stats into 1 of the 3, whichever is highest. That leads me to believe 2 of your 3 stats will become 0 whilst the proc is active, with the third being stupidly high. So this is what would happen for me:
According to the armory, I have 6161 haste, 6998 crit, and 1398 mastery. I'm not going to bother with raid buffs to keep the example simple.
So crit is my highest stat, which means when the Rune procs I will have 6998 + 6161 + 1398 = 14,557 crit rating, but 0 haste and 0 mastery. 0 mastery is negligible, who cares, but 0 haste means my Chi generation slows right down. That would be annoying at best, and potentially self-destructive at worst. You'd gain a lot of crit which could mean you'd have as good as 100% uptime on EB when it procs, but is that really necessary?
The alternative is if haste is your highest stat, you'd lose all your crit so get no EB procs at all during the proc, then gain an absolute ton of haste, more than you'd ever need. That alternative isn't quite so bad in my mind, but you're not really gaining all that much during the proc either.
It all rests on whether 2 of the 3 stats are actually zero'd out, or if the highest stat just gains the values of the other 2 without losing them. If you don't lose them, Rune is probably going to be BiS (and make sure crit is your highest stat). If you do, it sounds far too problematic. Give it to a DPSer.