clip from practice earlier today. seems like you have to hit from the top and face the right direction otherwise it will kick you out to the right instead of clipping through the left side. Saves 1-2 seconds.
i try and get hit by the 1st plant to get i-frames past the 2nd plant (prior to clip) - although i dont think this is necessary.
If you jump to soon you dont clear the platform and if you jump to late the clip will kick you out to the right it seems.
I try and use the line of the blue brick before the plant as a guide, but its tough to get right. There is also a back up, not getting it first try, but i dont think it saves any time.
Essentially you want to take the hit from the seahorse as late as possible, so you can use the i-frames to get past the 1st plant to then take the hit at the end of the plant as opposed to its projectiles.
Doing that will let you use the i-frames from the 2nd bop to get past the 2nd plant's hits that will allow you to set up the clip.