Oz's Flame Gear after Jump?

I think the 40% damage refers to the damage dealt by the skill the moment you cast it, to any monster near your character. I got no experience using flame gear, but I've used poison mist and I remember it acting as a regular attack the moment you cast it. hitting 1 monster in front of you.

Yes, I was thinking this as well, and yeah Flame Gear works the same way, dealing damage on cast. I'm going to do some testing on my bishop and see if this is what they're referring too.