The most obvious idea to me would be to have mints from existing trusted custodians like Alby. That doesn’t do anything to decentralize things more than they already are, but those entities have proven themselves so far to be reliable services and not rug their users, and I believe that Cashu would offer their users some additional benefits over what they already offer.

New custodians are simply going to be untrustworthy until they prove otherwise. Or at least they should be, and I wouldn’t want to leave any sats on a custodian I know nothing about.

Personally, I wouldn’t want to use more than one or two primary mints/custodians for my balances, and I would want to be able to immediately swap any received payments either to my mints or perhaps even just directly to my lightning address/node.