WHOHOO MIRACLE TIMMEEE

Exactly this. Clean slate events take way more time to collect than I can allot.
Better yet, have more events that give shield scrolls/protection scrolls as rewards like BF shop or RED shop. Hands down the best rewards from an event, ever. Or the candy point event. All cash scrolls should be obtainable like that every once in a while.

of course, but they're both pretty rare, with the CS ones being even rarer than the events i'd say.