Couple things:
  • Putting your combos in a macro like this is a bad idea, in case, for any reason, you need to break the combo, switch targets, become incapacitated, etc. You won't be able to pick up where you left off, which can lead to disastrous consequences in the middle of content.
  • Any macro you have otherwise and attempt to use during macros like these will break this macro, and stop it from running.
  • The /wait command only operates in whole seconds, so 2.5 is rounded up to 3, which means any stats you've put into Skill Speed are completely worthless, and that you're cutting into your damage output by a significant chunk.