Okay... let's discuss this, arcane missiles with a lightning capacitor and mystical skyfire diamond and clearcasting.
Arcane missiles launches 5 missiles at an opponent. Each can proc clearcasting, which gives you a free spell 10% of the time. So, every 2nd arcane missile spell (on average) you get a free one. Also, 5% of the time, it casts in 50% of the time. So every 5th cast should be a 2.5 second channel of 5 missiles (pow*pow*pow). Also, with the lightning capacitor, I have a 25% crit percent now, plus the 30% I would get every 3rd volley. So every other arcane missile volley, I should also toss a lightning bolt in there.
Does this sound right? Sounds like I ought to spec full arcane (even without the T5 bonus) and be an arcane missile spammer!