I've been taking a different strategy this time. Rather than level someone up to 10 and lose them on a full day of token collection, I'm keeping everyone at 9 until they are no longer useful for tokens. With Vader at 8 and Han at 9, every Star Wars character can still collect tokens, so I'm keeping everyone who is ready for 10 there until they have nothing left to collect for. Same with my Raya and Friends characters, come to think of it. The only one who isn't collecting tokens is Raya, but she's not even ready to move to 9 yet.
As for Raya and Friends, who it seems like I've been collecting for since last year, here's where I am:
Raya - 8
Sisu - ready for 10
Namaari - 9
Tuktuk - ready for 10
Boun - ready for 10