Quote from wolfram;134678:
Basically you use blaze on it while its in its knockback animation.
Either you can 2+blaze. Like Trigger says, your hits actually register before the animation, so as soon as you hit that mouse button the 2nd time, you should have blaze charging. The damage registers and you let go for the knockdown requirement.
IS spear+Blaze works.
Thats how I did it.
You can't do 2+Blaze too fast or it doesn't count, though. There seems to be this precise period of time where it counts.
Also, using a pet to knockback using counter to hit the monster with blaze doesn't count.
Using a party member's smash does. If you find parties running G10 Semifinal, there's always a bunch of people smashing the ghosts to death, and you can squeeze in a few quick blazes after the knockbacks for easy training.