Claim super intelligent aliens made it and then say that one of the inherent definitions of those aliens is that 1. They came before absolutely anything and everything else. 2. They make universes. 3. They observe universes but do not interfere with them which is why everything about our universe seems absent of intelligent intervention.
I then ask then what, other than more believers and having been a concept longer, does their God have that my aliens do not. Any time they insist God came first, I point out that it's a contradiction to the first definition and thus they're wrong.