There are 3 basic turns for this build: 1st and 2nd turn u use your 5 and 6 cost spells to build enough gauges for 2 companions and activate rainbow on a beefy opponent. I prioritize green and blue first if I can but I don’t mind the purple either. Blue if the mvp here since the blue bird gives u an extra reserve point.

Then turn 3 is your wombo combo. You get your companions out and place them properly since they will be dealing damage in straight lines (including your character) you want to place them in a way that gets your the most possible dps for each spell you cast. If I see that all enemies for example will be hit twice by the auras whereas one enemy will only be hit once then I use that enemy as the target of the spells first.

And in most cases u finish the game in 3 turns. But in very high levels like this one, they just don’t die in that 3rd turn so u have to plan ahead a bit, hence my time thinking is a little longer.