The 6 GCD wildfire thing should be a visual bug. WF is not getting 6 GCDs in game as there isn't enough time without significant supposed. I believe the window for wildfire actually closes a tiny bit before 10 seconds and that might be why it looks different in logs, but it's only a guess.

6 GCD Overheat is only possible by using FT near the end of the oGCD window and having 0 clipping or lag. Wildfire doesn't work this same way so it should only have 5 GCDs.

Either way all of this stuff is pretty ridiculous and shouldn't even be a thing because it just punishes anyone without very low latency.