Actually, if you treat Contagion like Raging Strikes, it still works out. Pop Raging Strikes while you're burning your 2nd and 3rd Aetherflow stacks (so they'll be buffed), and go into DWT Trance and pop Tri-Disaster just like we do now.
Edit: Except for the fact that Contagion is 15s, where Raging Strikes was 18s :-/
