If a Goldfish rams your Mobula and you didn't intend that to be on purpose, you did something wrong.
If something goes wrong, you can always blame your ally. But if you want nothing to go wrong to begin with, watch the map, know the ranges that your ally and enemies want to operate in and coordinate victory from there. If your map/s (map per second) is below "pretty much always", you don't know the map and will have to fall back to blaming your ally again.