You will want a 2400kv motor for 2s, the minis, even the biplanes, like a fair bit of airspeed to be happy.
The 2204 runs best on an 850mah 3s, run it at a lower throttle, they cruise well on that. It will hang off the prop on full throttle! Power is not a problem. 6x4 prop runs great on that. A 5x3 works too, they run best a little faster.
Just build as light as possible.
I prefer a 20A esc as well, gives more headroom. I ran a 2204 on an old 20A Hobbyking ESC and the esc got hot enough to feel the heat on the outside of the nose!