Since we are talking about procs (some related below):
I'm still fleshing out my Enhancement Shaman. But, Desolation Gear 4 piece has to be BiS or VERY CLOSE.
With the 2 piece buff you can basically look at the pants as having +19 critical strike and +10 haste... even with out gem slots that is pretty nuts.
You lose 3 gem slots on the pants, but the Heroic Resolution buff +22 agility is up a solid 2 times per minute so +22 agility basically 30 seconds out of 60 seconds (if doomplate is similar there is no way that set is not BiS). IT ONLY TRIGGERS ON Melee attacks... Auto/Stormstrike/Lavalash/Windfury/Flametounge can all proc it, or any extra attacks.
For the record: I ran Escape from Dump-hold 40ish times to get chest to drop... I boosted myself though Shattered Halls for the Gloves 22 times... the best luck I had is that the pants dropped from Skettis Halls on my first run... apparently that is the worst grind... so props to me for being awesome.
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I am still working on what weapons to use.
There seems to be 4 avenues you can go. If I had i49, they are BiS... please don't argue against it, any of that dumb shit is over with, they are BiS for any class.
But I don't so:
Haste Proc: Bladefist and Blackout... the procs are really low. Black out 2ISH per minute, Bladefist is once per minute ISH, just does not seem worth it to me. Elemental force enchants.
Extra attack Proc: Ironfoe and Flurry Axe with the Extra attack Trinket... this looks better to me than haste, I'll probably use this on and off. Elemental force enchants. Again tho, i don't like the proc frequency... this just seems to me to be more of a raidboss setup where I'm going full ham for long damage.
The one I think I like the most is Mok Headcracker mainhand with +4 weapon damage and Claw of the watcher off hand with +6 agility (you could use Blackout here for the proc, but I'm just stacking crit for big boy hits). Mok Headcracker mainhand gives you a 50 point damage boost to almost every ability (including Elemental Bast, LB, FS, and FlmS) because of the slow weapon speed... plus it takes the WF/FT proc damage up by 5-10 on each attack... that is huge. I also like this because Elemental Blast can crit for 900-1000.
Cudgel of Naralax off hand DECREASES your damage (on ALL abilities) if you use it instead of the Claw. So I can only conclude that a slow speed weapon only matters MAIN HAND... not off hand, at least at 20.