PLD already has a recent Enspell buff, this is why I rule it out currently. Comparatively RDM is overdue for a bone in the enspell department, especially when you factor Enspell II's to be in the 50-60 range.
Brave is more likely to fall in the hands of White Mage than Scholar if it was solo. But I'm more of the feeling that "Brave" is going to be a version of "Haste II" that people have occasionally mentioned, in which case, you'll likely see both RDM and WHM get it.