I'm a fan of the seed steep: Mix a huge batch 25% Caps VCv2, no nic. Use this as flavoring, multiplying the recipe recommendation by 4. Still needs to sit overnight for other flavors to blend once mixed.
Concentrated VCv2 is at least 2 weeks away from tasting decent imo, good at 3, great at 4. You shouldn't be able to smell butyric acid when opening a fully steeped bottle.
After tasting it fully steeped a few times, I can enjoy it fresh a little bit, whereas I used to hate it.
My favorite custard vape so far:
Jason's White Coconut cake (read thread for author updates and inspiration). Haven't tried Game Over.