A couple of changes that I always make to Mage_T8_20_51_00 to improve it.
As spirit goes up the requirement for regeneration while casting goes down. As Mage_T8_20_51_00 has 474 spirit arcane meditation can be dropped all together in favour of more student of the mind. I still see no down time and obviously the damage goes up.
talents=http://www.wowhead.com/?talent=of0Vcu0cZ0EcoRhIhVhbhct
I've also removed combustion and taken a point in the range talent as with so much crit and living bomb consuming the charges it doesn't seem to do anything worth while these days.
'/mana_gem,trigger=1000' becomes '/mana_gem' I think the trigger at 1000 was for T7 2set. A mana gem is worth about 3400 mana these days.
Just to make a point that it wasn't needed unless its a very mana intensive fight (I'm using lots of AoE) evocation is commented out. '#actions+=/evocation'
Scorch is taken out of the rotation an ISB warlock or someone with the scorch glyph is doing it.
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Also is this appropriate for simulating
Hyperspeed Accelerators as a glove enchant?
actions+=/haste_trinket,name=eng_hyperspeed,rating=340,length=10,cooldown=60