Would it be possible to either make all the Mysterious Guardian abilities be based off of CHA, or make it so that all charisma based Sentai class features use wisdom instead if you take that ACF? Otherwise, Guardians are going to want high charisma, constitution, wisdom, and, to a lesser extent, strength and dexterity. That seems a little too MAD to my mind.

Also, while Mysterious Guardians will generally have at least a +1 WIS modifier, perhaps it'd be a good idea to make it so that it is always possible for Swift Takedown to knock a target unconscous, even if the Guardian is suffering from a hefty WIS penalty.