Tal,

I'm frost specced currently as it seemed the most multi-boxing friendly. (Summon Water elemental whenever available, option to pop the talent that resets all frost cooldowns on a boss fight, icy veins when available and spam frostbolt.) I'm also leary of castsequence macro's after seeing numerous posts on these boards about DPS gimping.

That said, I'd be curious to see your spec for arcane. Frost seems SO out of style I'd be open to changing specs (and to a castsequence) if its an improvement.