You have a lot of Pierce Types there

For your Helper Squad (Team 1) i would suggest:

1. Toad Lily and Robinia for Pest Controll. Helps your Allies and yourself farming 12-5 effectively.
2. Cactace for Atk Buff and Rainbow Power.
3. Camellia for AOE, Atk Buff and a little bit Survivability through her Defense Buff.
4. Anthurium for Speed and Burst Damage (Atk Buff for the first turn). Speed is always n1 for a Pest Controll Squad cause you want to encounter those pesky Pests with that Squad first and absorb the Pest Damage.

Team 2 (Counterattack Squad):
1. Rose + Hypericum are your Counterattackers.
2. Lechenaultia, Star Lily and Rubellum buff Atk and Defense for the whole Squad. More Defense = more Counterattack Damage from Rose and Hypericum.

Team 3 (Skill Activation Squad):
1. Bride Cactace cause she has a Skill Activation Buff for herself on first turn.
2. Geranium (permanent 1,2 Skill Activation Buff for the whole Group).
3. Tachibana (Skill Activation Buff on turn three for the whole Group).
4. Mountain Lily + Chocolate Cosmos for Atk Buff, Defense and the very usefull Ability to create Choco Fountains.

Team 4 (4* you prefer)

Yeah personally i would go with:
1. Lilac is a must have in my opinion cause you need a Girl who's immun to Spider Web Nodes.
2. Canola (cause i like her and she was my starter ), Buffs Atk. (You could scratch her though cause you already have a lot of Pierce Types)
3. Yeah the last three Slots are up to you. Depends how much Skill/Equipment Slots you have unlocked for those 4* and how fast the other Teams are.

I didn't calculate Team Speed but from a synergistic point of view that looks solid.

Please let me know what you think

The other Forum Dwellers could also make some suggestions