>>1609087
If you mean Bloom out of those candidates and already did your husbando or just need a tiebreaker then i'd say it should be the one you consistently use for farming your dailies or use to nuke events when not having enough bonus units since it is just getting a third passive so you can do run three bonus passives for more Exp, Friendship, Coins, Medals, P.Gem or use Auto while still using the most relevant one to streamline the process, and with that in mind i would say Christmas Monomasa or Summer Barrel, the former i don't have myself but someone on my friend list have S3+Gold Elemedal+RainbowElemedal one that just deletes the Medal encounters on Turn 2 (Which lets my Medal Farm own team use full medal boosters and Procy without needing to auto and without me needing to manually play, great QoL), S.Barrel is my own old workhorse for farming due his simple and straightforward S3.

Point is, first bloom your favorite character because it is your favorite characters and you will probably use him as much as you can anyway even if it is just as passive holding stick on a farm team, then bloom what you use for farming, which is probably supporting your favorite, then Bloom the unit you have on your Supportlist so you can deck them out in 3 Passives and possibly get more people to choose them and then save for potential Alts so you can instant cap them.

But that was just how i did it, S.Barrel and (Welfare) Pubes first, then the characters who farmed (Barrel and S.Victom) and did Challenge Quests (Circus Furlong and Storm Procy) with them, then filled out so i had one of each element Bloomed and on my support list, point is, and then Sterio and Star Pubes hit, if you want the meta pick it would be your farmers so they can carry more drop bonus passives when farming cause that shit adds up.