What levels does Flash Jump increases in distance?

I remember a couple years ago, I read up somewhere on SW.net that there were 'specific' levels in which FJ gains distance. I'd like to find this out, because in the skill's details, it doesn't tell you how much more distance you're gaining. Which irritates me, because I want to get it to a certain distance to be useful enough, but without maxing it. Does anybody here know? If not, can you estimate? Perhaps someone like Fiel would know.

On levels that are one more than a multiple of 4.

On levels that are one more than a multiple of 4.

Unless I'm understanding you wrong, then there is no difference between a level 20 FJ and a level 17 FJ?

Based on what dusk said:

Levels 1, 5, 9, 13, 17, and 20.

Is that right?

Unless I'm understanding you wrong, then there is no difference between a level 20 FJ and a level 17 FJ?

Besides MP cost, but I'm going off memory here. Not 100% sure.

I believe it was for every odd lvl (1,3,5...) it adds distance and for every even lvl (2,4,6...) it adds speed.
Nothing below lvl20 will equate to the same distance and speed, if that's what you want to know. That is for Hermits anyway, seeing as you are a Night Walker, I don't know if it's exactly the same, but if it's a copy and paste, you can bet on what I've said.