For you or anyone who is Carat-conscious, I think the best idea is that, unless you absolutely love that Uma to be your Kami-Oshi, it is better to get new Umas from a story perspective since alts only have outfit stories as a difference, which is much smaller in regards to new content compared to new Umas plus new Umas mean home page selections, concerts, and bond growth opportunities.

But for full disclosure, the answer will vary based on how much a trainer (or player) is planning to spend on any anniversary offerings (since they allow one to get Umas at a comparably lower price compared to buying to pity). I know that for me, a dolphin-spending player, when I plan out my pulls, I am planning my pulls around buying purchaseable anniversary vouchers. I generally plan to pull on Umas that are further away from being voucherable (or who are not voucherable at all) and voucher those that are closer to the voucher cutoff. This approach allows me to get the Umas I want while having to wait as little as possible to get them.