I just realized another fun thing that works out in Gestalt:
Get 4 levels in Spellwarp Sniper and 7 levels in Enlightened Fist. You also need 13 levels of Duskblade and a class that gets Whirling Blade as a spell known (eh, Prestige Bard).
You can now cast Whirling Blade as a ray, which is turned into a Touch Attack with Enlightened Fist.
Channel Whirling Blade into a full attack.
Each attack lets you make a melee attack.
Thanks to Arcane Channeling, that melee attack also channels Whirling Blade.
Each attack gives you potentially an infinite number of attacks.
Now, we just need to get 1d2 Crusader onto the gestalt build, so we can (theoretically) make an infinite number of attacks that deal an infinite amount of damage...