You setup a button in ISBoxer like this:

Two steps.
Step 1: Sends 1 to everyone
Step 2: Sends 2, 3, 4, 5, 6 to everyone

Then you set the options so that it advances a step when you press OR release a button. This way it "prioritizes" the downpress so that if you're on the GCD (as you should be) it'll basically always take the downpress button first.

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I've been busy with life and I realized I was only logging in to do dailies and maybe grind a few 5's games. I've been keeping up on WoW a bit. Have they merged all the arena BG's yet? If so, how is it? Anyone get massive rating yet?