I'm having problems double-weaving non-GCD skills during the rotation. Quite often I'm finding the second isn't triggering, and the GCD skill is repeating instead. I macro, (arthritis, lack of reachable keys otherwise,) and am wondering if this is part of the problem.

e.g.

/macroicon "Impulse Drive"
/ac "Impulse Drive" <t>
/ac "Internal Release" <me>
/ac "Blood of the Dragon" <me>

Is this a latency thing, (Hong Kong, 1 gig line, 120ms,) do you think, or am I just short on luck and need to manually input the skills? I don't have the same issue with Paladin, for some reason. Is that the higher GCD?