... shit, that is indeed what it says. I mean, I have her, but that is nowhere near as good as Rage bar decrease.
There are uses for that sure, as it allows your enemies to reach Rage WAY faster and thus enables your Acala usage faster as well. But overall, I'd much rather have a Rage cut than that.
... also, I'm now somewhat scared of what Wind Rags will be like, if people just AAB with Acala with the main boss targeted...