A question, not sure if it's already been mentioned, but why are you using macros for your abilities that deal damage? At the higher levels, with full gear, the skill speed on GCD brings the GCD to 2.4 seconds, and since 2.5 isn't, from what I remember, an actual number you can put in, you're putting yourself at a DPS loss. Which, if you're not worried about, great! But if you want to maximize your damage, I wouldn't even bother with the whole shenanigan.

But, with your problem there, it HAS been mentioned, 2.5 isn't your GCD by the sounds of it, and since that is the case, you need to up it to 3.0 seconds, which, is an even greater DPS loss if your GCD is around 2.7-2.8.

So, that's your decision, but I would highly recommend not using them.

~KR