I do actually want to know what the apparently so common christian reply to these arguments is

Find a smart Christian and talk to her.

You could also think about what is evidence and what is ideas in your mind about what God (according to your convenient definition of him) must do or cannot do. There's a big difference. You might consider meme propagation and ruminate on why certain written down "random hypotheses" become religions and take over the world, while others don't. Oh, and speculations about the probabilities of things happening in universes with gods and universes without gods are neither facts nor arguments.