Just checked my eDPS as you state it, atm it is:Quote from Jaetch
I don't know if you're misunderstanding eDPS or something, but if you're only getting 2.5M eDPS out Arcane Torrent with 1.3M sheet DPS, something is wrong. I have a bit over 800K buffed DPS and I'm getting about 14.5M eDPS with straight Cascade cast and Ignite Magic Weapon buff.
Dps single target: 20.3mill
Dps single target(Archon): 39.3mill
Spec (Same both times):http://eu.battle.net/d3/en/calculator/wizard#UemOjS!SRTZ!YccZaZ
Only with 1 test, and not 100% precise, but that's my numbers atm :).