Honestly, the biggest issue here is using combat macros in this manner, in the first place, there's no tangible benefit in using them, you are literally only required to press two button to execute Gnashing combo and Continuation, it is extremely simple to do. It is also detrimental to use macros for combat outside of certain targetting macros for the likes of Shirk, or ST mitigation, like Intervention, Heart of Corundum, etc, due to the fact that, macros can only operate in seconds, not milliseconds, using wait timer macros are a significant DPS loss over the course of a fight. Further you lose agency over your rotation by using these kind of macros, if a boss jumps for instance or have a forced disengagement, you macro will continue, and you will end up having to manually press you buttons, or else just waste a load more DPS by ignoring that you haven't completed your combo, and return to the rest of your rotation after Wicked Talon.