Then, I don't see anything the matter with that. An alliance would only be natural.
[A beat, pausing.]
But for that, we also have to trust each other, however loosely. Our goals match up, sure. But we'll have to be open with one another, to the extent that we can be, about who our other allies are. Moreover, what our skill sets are, so we know when to call on each other. Does that sound reasonable?