ISC 3-7 sort of counts. You're technically capturing the same spell over and over, but overall it acts as a single survival spell where it doesn't count as clearing the stage unless you survive the time limit.
I think one of the fighting games might have survival spells too? At least I think I recall seeing one or more in a video before.
Also Marisa's "Blazing Star-like Tag" belongs in the Extra category.
Notably Touhou 6, 12.8, and 13 have only 1 survival spell in the game (the obligatory Extra 9th spell). IN has the most, of course. Perhaps listing which game it's in would be relevant too.
As for survivals only... wouldn't it get sort of boring? I suppose the timers would need to be a lot shorter on average (see: Kaguya's Last Spell rush at the end, maybe even shorter).
Edit: Perhaps you should also change the thread title to the effect of "Touhou survival spell list". Right now it sounds like it'd be general advice on how survive in Touhou games (e.g. practice a lot, bomb in advance of when you think you'd get hit, and such).