I might be in the minority, but the way I would have done it is totally do away with the atma drops period. Get a quest, move to books - half the cost of them to 750 myth each, but double the amount of books you do.

Keeps the myth cost the same, but lets you have a quantifiable path and not depend on RNG so much, since some people have terrible luck and some were done with all 12 in one evening.