Abnormega: The enemy would have to next to you within the radius of the blast (which is very small) in order to knock them back. I find it only works when the enemy is doing a follow up attack after the first hit....it works just not as useful.
caesyit91: If that's the case, I think I'll just ignore this skill.
Thanks for the help guys.
I mentioned this before, but it seems to work better with the healing bubble quen. When you have a couple extra unspent points, I suggest you make a save, then try them out together.