... for the luz.
Anyway, I wanted to see how it played out with gemming haste instead of spellpower on a bunch of high dps encounters (Lady Deathwhisper and Festergut in special).
I replaced my Runed Dragon's Eyes (39sp) with Quick Dragon's Eyes (34 haste), and my Runed Cardinal Ruby (23 sp) with Reckless Ametrine (12 sp, 10 haste). Beyond that I kept my purple gems, and already socked orange gems to save socket bonuses. (See my armoury link in my signature for full character view).
All in all, I changed roughly 135 spellpower into 122 haste rating. So self-buffed I had 1121 haste (I got the wand after the Festergut).
The result was good I think. No notorious dps drop, nor any signifigent gain. I can't really say the difference in haste made a difference you could feel, but somehow I kinda like it.
But so what to do now. Keep the haste gems, or go back to spellpower