Not sure if macros in this game are capable of doing what you want done. Macros here are kinda bland compared to... certain other games.

Another noteworthy problem with macroing skills is that, in your example, Full Thrust wouldn't be queued up like hitting a normal skill would be. It may be small, but assuming your reflexes are perfect (and in a long fight, it won't be) you're essentially adding your ping to your GCD every time you use a macro'd skill. Normally you can hit FT about half a second early and it'll go off as soon as the previous GCD was finished.

Over the course of a long fight, this can be a very, very substantial DPS loss.