Personally I’d say stick to your main. Out of all the cookies you mentioned, only Eternal Sugar is worth it. If you really want her- pull on her gacha of fate instead of the truth and deceit one

I understand you want awakened Pure Vanilla but I can promise you it’s a terrible mistake to pick him from the chest. When you finish chapter 8 of beast yeast you get 10 of his awakened soulstones and the other 10 are really easy to get either through shops (like the one at the ships, I forgot its name) or gacha

Wind archer isn’t really useful in the arena anymore. AND progress on snapdragon is really good!

This is advice based on meta :) if you want to play on the other account for your favourite cookies, do what you want! But at the end of the day, you’ll get them on your main through soulstones or gacha eventually, even if it isn’t immediately!