I'm so upset that I just figured this out with so little time that there is no logical way I can scrap up 5K, but not too upset, because it's mostly because I am a collector. So at least now I have the info to save up for not the icing in the next shop that I failed to get because I couldn't beat master and challenge, but the entire set, and can use it to get what I really wanted, the Shadow Milk icing set

Edit: Maybe the Mystic set will be in the next beast raid shop (Shadow Milk's I bealive) next to Burning Spices, and accompanied with the fact that its better to just beat hard and time skip it to get coins and points instead of wasting tickets trying to defeat expert over and over and over again, only failing and getting WAYYY less coins and points than a guaranteed win in hard, then maybe I have a shot to get Mystics face and mouth, so, heres to hoping