It'll settle down after you get the initial team built, and then the whale teams leveled
I don't keep a huge stockpile of gold or manyus to this day. I use them.
Anything more than one girls worth goes towards blooming someone that I can run a CSQ(when its discounted) on that generates gems
and still got a ton of them left. At least 30. And if I have extra millions I level up some overpriced personal equip
Pretty much try run what's on sale for the week. Got restocked on bloom mats last week, done with Nidhogg, and doin some whale until the weekly reset. See what next week brings hopefully some kick ass June brides!