with same resource invested, rainbow team is always inferior. even if you have 0 assault power weapon grid, you still have eidelon bonus. no need to say the more developed your weapon grid is, the larger the gap becomes. unless there are super rare abilities (like Gaia, sol, cthulu, raiko), there is no point using off element himes at all. rainbow weapon grid is even a more worthless idea, you have to use it when you are start playing(not many choices), but that's all. as an infant you might risk fall down, but you eventually have to learn how to walk right?