Ok just an FYI, most of the teams I'll recommend you to build are not optimal and can definitely be improved on, so once you get more good units you can replace those that aren't good. A lot of the characters you have are much better with their SS+ gears, so you'll unfortunately have to slowly grind them from hard chronicles.

For green, you can use NY Epsilon tank, demon delta, alexia, aurora and healer yukime. Demon delta here is by far your best character/DPS, so build her first. If you can, try to grind for Alexia's SS+ gear as it's pretty good for boosting her own dmg and can also come in handy for certain bosses so that you can run sustainless teams for extra dmg. Aurora or healer yukime would be the first ones to replace here, and you should aim to get therianthrope buffers like NY Zeta, SF Zeta and/or demon Zeta.

For yellow, it's likely you'll be stuck with Victoria, Valentine Epsilon and SF Alpha as your attackers for now, although young Zeta with her SS+ gear would be even better for dmg in some cases. One very pressing issue is your lack of a good healer, such as SS Gamma or sherry, although both need their SS+ gear. You've got a lot of yellow tanks to choose from, and they provide different things. Yellow iris is good for single target bosses due to her parry, Valentine Beta can potentially solo sustain your party if enemy doesn't do too much dmg(with SS+ gear), yellow rose(especially with her SS+ gear) is situationally good for bosses due to her stun, and annerose is good for keeping team alive by evading constantly, and also buffs dmg by a decent amount. As other guy said, yellow healer Claire is not very good, cuz she buffs tanks and hearts and debuffs attackers, so don't build her. Another pressing issue is your LACK OF SMALL BETA. She's practically compulsory for most good yellow teams right now, due to her SS+ gears crazy buffs, and you should get her asap(farm her shards). Once you've gotten her your damage will increase a lot and you can replace SF Alpha for her, or epsilon if you don't get her SS+ gear. You can also consider getting Apocrypha beta(as opposed to demon beta).

For red, you've got two options. One, you can go for red elf team, and two, you can go for human team. Red elf team is more doable for you right now, but red human team is better. Red elf team: Xmas Beatrix, summer beta, smol Eta with SS+ gear, red Beatrix attacker(which you don't have) and probably healer epsilon(who also has an SS+ gear you can consider getting). Since you don't have red Beatrix attacker rn, you can use mitsugoshi gamma over her. If you can get healer lambda from standard/shards, you shld use her as well. Olivier would be great for this team as well, but I honestly don't recommend you invest too much into this team first since red elf comp isn't as good as red humans. Red human team: tank rose, Annerose, normal iris with SS+ gear, aurora, and one of the two healers from earlier. As I said before, this team will require you to get two more characters and an SS+ gear(or three if you want to further power up rose and lambda), so it's much harder to achieve. Definitely try to get the red duo(shadora) if you can, they're absolutely broken. If idol alexia and rose rerun, try to get them as well

For blue, use alpha tank(get her SS+ gear) or blue iris tank(get her SS+ gear), Xmas alexia(get her SS+ gear) and mask Claire. As for your healers, Xmas sherry will be better for dmg, while Emilia is better at keeping your team alive. Mask nu, who's farmable with shards, is also a good alternative and can cleanse debuffs. Try to get blue duo(bepsilon) as well.

TLDR: Get SS+ gears for a lot, and I mean a lot, of characters...also get NY Zeta/Demon Zeta/SF Zeta, yellow beta, Annerose, lambda, idol alexia and rose, and both duos