[1.2.326] (4) Really last chance!

Quoting myself.

I thought he meant the damage reduction per mob.

You still need confirmation that damage over time is affected by Elemental Amplification or Elemental Wands, don't you? All I know right now is that it works off of your range; i.e. literally 160%/s. The 160% may be affected by Amplification or Wand, but your range surely is not, as those things affect spell base damage.

Also, you shouldn't be including Magic Mastery's bonus into the equation. You don't include Bow Expertise into a Bow Master's DPS, do you? It affects their overall Magic Attack, which has nothing to do with %/s.

Illusion attack speed is in 2010ms. Here
370%x4 Illusion @ 2010ms -3 Booster
150% Amplification
110% Dragon Fury
1358.8%/s

Don't know how much Phantom Imprint does. Blaze is a better single target DPS I believe anyways.