Originally Posted by nick1024

You don't need all slice girl.
My suggestion is to make an automatic team based on power. Then substitute weaker non-slice girls (starting at squad 8) for most powered slice ones not included (just order by power and filter by slice to choice them). Repeat until whale become red.

I put my regular squads in the first 4 slots (these are not necessarily my highest TP girls, since I assemble my squads on synergies, like a squad based on ability-trigger, another squad with counter-girls, etc.), the squad best at dealing with small pests in the first slot.

In the fifth slot, I put some girls that make things easier for ALL squads and the whale ship, like:
-Increasing the light gauge at the start (Cattleya, Mei Plumblossom, Convallaria, there's some more with passives like these)
-Spawning Solar Shrine nodes (Strawberry Candle)
-Spawning Chocolate Healing Nodes (Chocolate Cosmos, Lantana)

If your first 4 squads do their work, then this fifth squad should never actually get in combat, so no need to really worry about them being leveled

Last squads are my "colour fillers", here I put the most powerful girls I still have available of the boss's "weak colour". So that's 15 units of the appropriate color to make the ship Slice, Hit, Pierce or Magic. 16 units of the appropriate colour are required for that, but there's usually 4-6 units of the appropriate colour in the first 5 squads, and often one or two more in the helper squad as well.

As a result, I only ever have to update the last 3 squads to match the boss type, the first five squads never change.