In the third bonus stage, the Spirit Boosts can screw up a perfect run, as the first wave has narrow platforms on which to land and jump off of, and the speed boost is typically overkill for those precision leaps, all but requiring you to avoid the boosts for that moment. One of the spirit boosts appears at the front edge of the longer platform, making it a little tricky to evade.
For this alone a Spirit Boost Switch Dark Divinity would be welcome. Anyone agree?