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.
These dashes lines up shade cloak's cooldown well so you can buffer dashes and prejump --> shade dash through the last batch of frogs before Marmu, assuming you don't need to heal and dream nail the mossflies. You can still land into a frog at the end of the dash but this should ensure you take 1 hit at most.
Use minihops to reach the platform I shade dash off to save the shade cloak charge (this is faster anyway). Then dash after landing and do the next couple dashes quickly enough so you get two normal dashes for every shade dash. It is a little bit harder to get soul this way but you can get extra hits on the frogs pretty safely.
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