Okay, it's time to come out of the closet:
I do a little messing around with a mage also:
http://armory.wow-europe.com/charact...gion&cn=Nitiga
(- which of course is in pvp-gear at the time of writing, but swap the pvp pieces for
Strip of Remorse (with one 23sp),
Bloodmage Robe (with one 23sp and one 12sp/10spi and +10 all stats enchant) and
Band of the Invoker (with +23sp enchant))
GS is about 5.3k and simucrafting put this spec and gear well above 8k sustained dps on a patchwerk-style fight...
But I usually average just below 5k without popping cooldowns and I have yet to breach the 6k barrier, even with cooldowns.
I use the standard arcane rotation of 4 x Arcane Blast and then Arcane Missiles, regardless of Missile Barrage Proc. A macro to ensure that Presence of mind is on constant cooldown. Arcane Barrage and Fire Blast for those fights on the move. Molten armor for shield
So what exactly is it that I'm doing wrong? Not fast enough to push my buttons? Latency? Critical buffs missing?