Doing this shade soul into cdash in the first room of frogs seems to get me much more consistent low times. You activate the frogs later in the room during your cdash so they have less time to move around and get in awkward positions. In the next room you can dream nail the fool eater to regain the soul used on the fireball.
Note that you want to hold cdash a bit longer than usual; since it stops charging during the freezeframes but the sound keeps playing it's very easy to release it early if you go with your usual cdash greed.
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