Why would you feel bad about asking about those? Suwako is extremely strategy-heavy, so if there's one boss you'd want to ask about, it would have to be her.
I don't have that Survival Spellcard figured out either, but I deal with the other Spellcard by staying right in front of Suwako at the bottom of the screen until the first ring is about to hit.
Escape to the bottom-left, stop for a split-second, rush to the top left. Stay there until Suwako is done with her current wave of rings, then get back in front of Suwako using the (somewhat) clear right-hand side. At that point, just start over again. Depending on your timing, you might have to avoid some leftovers (assuming that avoiding them is possible), especially while going downwards and at the beginning of a new wave, but generally, this approach works.
Pretty sure there are better approaches, but I was rather happy when I finally managed to find a solution that actually worked.