Thanks for the advice EMX, PArcher and whiskey =D I'll see if anything changes in the next runs. In the meantime I'm practising on dummies to get a feel of the rotation. GCD are fine, now I need to weave oGCD regularly. I still tunnel view a little and forget about them to keep track of the rotation.

At least the rotation itself seems now less complicated than what I had thought when I first saw this thread: minor skill - combo - minor skill - combo, where minor skill is either Phlebotomize or Heavy thrust (which one of them depends on which one is down/about to go down and change), and combo is either IDC (Chaos thrust is not up or about to go down) or TTT (Chaos thrust). The main difference from what I did before is that I often used Heavy thrust and Phlebotomize together and I clipped accidentally either of them and Chaos thrust. This rotation should minimize the chances of this happening, I guess.