Patch Available - KMST 1.2.24

They could make it that it's 1 speed at the first few levels and then level 2 at the last level. Wouldn't be the first time they've done something like that. Or they could merge boosters with other skills (like weapon mastery) instead of making them separate.

or give skills like that MP ticks, so it consumes MP every second, with each level greatly reducing the amount.

of course, this is good for a game that can handle such things >looks at kanna