"In that case..."

Let her think about that for a moment.

"Instead of both of us just fighting at one, do you want to try handling doing most the attacking, and I'll back you up and let you know if there's something incoming, or if there's a good opening, or so on?"

Basically, playing to what both of them are used to for now, though Ritsuka will of course at least grab a weapon or two to be armed, just in case.