Your doing it wrong then. What you want to do is dynamic stack those skills cuz heat stacking them takes WAY too long. What I did was have one spot with canticle fire fist and flame arrow, then another dynamic spot with just the flame arrow, another with just fire arrow and another with the canticle. You then have a locked mind lock so that once you have the fire arrow and flame fist locked up you can keep them locked up. The once you start to cast the canticle, while thats going off you get up to a 4 stack again and once it cast you only have to wait the 5 second before the 5th card comes back to stack it one more time for the 5 stack and then your casting again. I guess the easiest way would be for me to make a video of this, I'll go do that now.