Hmm, might have to sleep on this one. Couple things though.

1. What affect is gravity having? Presumably it's doubling the exertion of Flash-Point, as it's usually carried out without training weights and the gravity of the world is the equivalent of your character having his weights.

2. How did he get in the air using Flash-Point? Presumably the idea is that he can run really fast, not really sure how this translates to ending up thirteen feet in the air unless he can also jump with immense force, which leaves the question of how he isn't flying into the stratosphere. I can buy Flash-Point working on the ground, sort of, but in the air it seems dubious that he can cancel all that momentum. It might as well be a teleportation spell at that point, which is a pretty high tier power for this level. 

3. You mentioned the sword was 'spinning' towards Metz, presumably that means its not hitting him hilt first? What part of the blade would be facing towards him if he remained stock still?

Also, as the blades were being kept in the air by some sort of spinning cog thing I don't claim to understand, now that two have left wouldn't the remaining two hit the ground? Can't remember what happened to them.

I'll have a reply tomorrow, but I would like an answer to question 2 and 3, question 1 is ultimately your decision much like me deciding when Metz has ran out of Mana, but Flash Point is a potentially devastating skill, I'd at least like to know if it has any discernible limits, much like Metz being unable to maintain that many spells.