Combat step

I look at it this way: Omitting points in Step means losing potential gain from a skill, while omitting points in booster only makes it last 40 seconds shorter, but otherwise have the same effect. If you're really OCD about your booster, you could probably take some 2nd or 3rd job SP to it.

*Step fan*

Hmm... I see. But does adding SP to step make it really more useful?