"Black Friday Big Spender Event"

I must be missing something here.
Isn't guardian scrolls only function to keep valuable scrolls from vanishing when they fail?
So how are these important for getting Tyrant equips to 8 stars? No enhancement scroll would be worth 30k, unless there was such a thing as an 8-star enhancement scroll. (These isn't, is there?)

You get to re-use your no-boom AEEs if they fail