It also depends how quickly you're killing things. I.e: when I first started doing t12 I had to Paeon during phase 2 because I was running dry, but now (when we push 4 Bennus), I can wait until the add phase. T10 t11 is non negotiable, I have to Paeon at least twice in those fights due to the 100% uptime. Also a Monk should be tp starved around the 4 30 mark, depending on gear.