When discussion multiple deities, there is no reason to assume that the deities have the traits normally asserted for the Abrahamic monotheistic God.
Frankly, there's no reason to assume these traits for a single God, either.
In most pantheons, and for most non-Abrahamics, the gods are not omniscient, perfect, or in fact have any of the omnimax traits asserted in Christianity, etc., nor are they equal to each other. They are entities with the potential to control or impact human lives--and that doesn't require perfection, omniscient, etc.
But those weren't the people I was talking to. If I assume the traits of God that the person I'm talking with already accepts, then:
- I can illustrate how their own god-concept is compatible with multiple gods.
- I avoid getting off on tangents where I assume some other god-concept with different attributes, just to have them come back at me with "well, *I* wouldn't call *that* a god."
Also, I think that under the surface, this thread is largely about the classical arguments for God (e.g. the Cosmological Argument, the Trancendental Argument, etc.). It's useful to point out that these arguments generally don't limit the number of gods to one if you really think about it: two, three or many gods would satisfy the arguments just as well as one god would. Most polytheistic god-concepts have nothing to do with these arguments for God, so bringing them up really has nothing to do with the issues at hand.
I know full well that there's a vast range of god-concepts out there.