If it helps, these are the specs I am currently using. The first is a very simple and easy to manage sustained dps spec. It doesn’t deal with any of the Harmony/Spark/Touch BS. It will do ok dps on a boss fight the longer the fight goes on but for short fights (like leveling) or when you want to solo a rare it’s not great.
Arcane “Simple” spec:
As much as this spec is the way I want to play, it’s not the one I am currently spending most of my time in. This spec does, however, allow you to spend virtually all your time casting Arcane Blast and Arcane Missles. As long as you make judicious use of your Mana Gem and Evocation, you almost never touch Arcane Barrage or drop your stacks unless Temporal Anomaly procs too much Time Warp and not Enough Arcane Surge but that’s very rare. The Impetus talent is the only one I would say is “negotiable”. Since this spec stays at 4 charges all the time, any procs from Impetus result in 10 seconds of 10% more damage which isn’t bad.
This next spec is the one I am using the most right now. It’s far more bursty, but it plays close enough to how I want to play to be acceptable. It’s not exactly what I want to be playing but it’s effective enough without the play style feeling too cumbersome.
Arcane “Bursty” spec:
With this spec, when dealing with bosses or soloing rares, I pre-cast Presence of Mind, open with Arcane Surge, hit my macro that combines Touch of the Magi and use of my Mana Gem, then spam Arcane Missiles until all my clear casts are consumed. Then it’s my two instant Arcane Blasts, and cycling clearcasted Missiles followed by two Blasts (due to Nether Precision). It’s just Arcane Blast spam without clearcasts.
I really don’t want to use Rune of Power, I despise it, but the stacked burst with Arcane Surge is just incomparable to Incanter’s Flow. I don’t hate Touch as much now that it’s instant cast and the missile spam + echo into it with Surge/Rune equals some worthwhile burst without requiring too much “thinking”. You Surge, hit the Touch/Gem macro, Missiles, Missiles, Missiles, Blast, Blast, and after that clearcasts determine what happens next.
Again, the Impetus talent is the only one I would say is “negotiable”, and like the previous spec, I stay at 4 charges virtually all the time, so any procs from Impetus result in 10 seconds of 10% more damage.
I hope this is somewhat helpful.