Thunderstrike - what am I missing?

[thejeff]

If you can pull off a reverse communion then each mage can cast CS,Aim,TStrikex3. They'll fall unconscious after 2 Strikes anyway, so what the AI does when you go off script doesn't really matter. You still get more total Strikes since you have more mages casting.
You could also cast wind Guide instead of each casting Aim.

The hard part is getting Storm up. You need more research and preferably a Staff of Storms. Your Communion Master could cast it after PoTS, or with a extra gem. And it halves precision, so even with Aim your total precision will be less.