if you macro a 15second long trinket to TF. You will run into problems sooner or later, just an example on an encounter like yor'sahj, you will TF on the boss just like you should but your macro also pops ur trinket, and than the oozes spawn and you start your long run to an ooze, while wasting the ''Agile 2290agility'' 15sec buff, imo if your going to use Kiroptyric Sigil just make a couple power auras for it and set it to a thumb button for best results.