We just recently put all the materials together to craft Black Grasp of the Destroyer late last night. I didn't have a chance to test them just yet.

My question is how exactly does "Equip: On successful melee or ranged attack gain 8 mana and drain 8 from the target. " work with regards to hunter abilities?

For example:

Volley - would it work every time someone was hit in the AoE per tic? Is volley even considered an attack or is it just considered an arcane spell?

Stings - would it work per tic or would it work at all?

Arcane Infused Gem?

The way it reads is also slightly confusing. I would assume this ability would act like a mana drain, where as you would only receive mana if the target is mana user.

Its not a proc, its an equip effect, works regardless if your target has mana or not. There are two effects:

8 mana gained as long as you hit.
8 mana drained if the target has a mana pool.

Each arrow of multishot will get you 8 mana, stings do not. Arcane shot does. Volley and traps do not.

Being a troll with these is good, beserk+rapid fire=regen.

Currently trying to get my guild to let me have the mats... they're currently hoading them for warrior BP's off Skeram.

Look carefully and you'll see that Blizzard may be trying to give incentive on using faster ranged weapons post normalization :x

Terra Noir guild chat, circa 04/27:

Pally #1: "Attention: [Black Grasp of the Destroyer]"
Pally #2: "We have unionized in protest against forms of bigotry most cruel."
Pally #1: "8x [Large Obsidian Shard], new fee per JoW. Discounts if female."
Pally #1, #2 have been kicked out of the guild.
GM: "Smartasses."

Alliance PvE amuses me in the sheer quantity of high ilvl blanketbuffs raids are blessed with.

probably not worth doing, but how does this compare to other shaman gloves?

For more of a grinding piece, versus a raid piece, but are there enough good, quick 1 handers that might allow an elemental/resto shaman to regen enough mana to fuel a constant spell casts?

say, from an epic perspective:
* Hand of Edward the Odd: http://www.thottbot.com/?i=21012
Lok'amir Il Romanthis: http://www.thottbot.com/?i=51948
Ironfoe (?): http://www.thottbot.com/?i=23837 - sidebar: does this stack with Windfury?
Ancient Hakkari Manslayer http://www.thottbot.com/?i=51611
or even something like spinal reaper?: http://www.thottbot.com/?i=38057

It'd be intriguing while not necessarily worth the materials.

Even at 8 mana a hit with a very fast weapon you'd be pretty hard pressed to gain more mana from these over the course of a boss fight than the 6 MP/5 on the Ten Storms gloves by the time you consider how much time you spend casting vs meleeing. Who knows, maybe Shaman will get something like this as an enhancement talent in the revamp since we have no other forms of passive mana regen other than the totem of doesn't-stack-with-fire-resist.

Edit: I will say this would be an intruiging option to have as a weapon enchant.

Enchancement is definitely the most efficient, but I don't know if Resto/enhancement is more common than Resto/Elemental

I was thinking more of a lightning bolt opener, lightning shield refresh, windfury refresh and earthshock for interrupts on heals. And if you hit a clear cast, great. My hope would be to cut down on drinking in between conservative fights.

With Edward the Odd, it might be interesting.