[Exxy]

Cleanse Body is -literally- the only thing that scales to WIL in the MA tree now. If anything, you have incentive not to get it due to being tied in to a stat that you have no need to prioritize.

EDIT: If I'm not making myself clear enough: What you have to give to be able to -viably- use Cleanse Body is not worth it. Leaving it as WIL doesn't really solve it. Although I can kind of agree with how Trex put it with the R*6 cap limit if you rearrange the Rank Order for the ailments cured (the one with the lowest average Status Level being R1, the highest average being R5).