Hyper in and dash right on this thorn rectangle. This should give you a bop on the seeker and not a super.
Make sure to not hold jump or fastfall afterwards when bopping this seeker.
Dash up after bopping the seeker at any time, then hold right near it when it does its reform explosion.

An upright dash between these two points should let the seeker drift straight into you.
Buffer the cornerkick after the upright dash for safety.