So I've been checking up on 3.1 and everything and noticed a trinket from Wintergrasp.

Platnum Disks of Swiftness
Binds when picked up
Unique
Trinket
Requires Level 80
Equip: Improves your resilience rating by 95 (1.16% @ L80).
Use: Increases your haste rating by 375 for 20 sec. (2 Min Cooldown)

I've thought about using this with the

Hyperspeed Accelerators
Permanently attaches hyperspeed accelerators to a pair of gloves, allowing a skilled engineer to increase their haste rating by 340 for 10 sec. (2 Min Cooldown)

How useful do you think this is? 715 haste is 21.8% spell haste for 10 sec. and 11.4% spell haste for the last 10 sec.

So it's not exactly

Power Infusion
Infuses the target with power, increasing spell casting speed by 20% and reducing the mana cost of all spells by 20%. Lasts 15 sec. (2 Min Cooldown)

just different.

What do you think?