Seriously, have you ever actually used in in pre-evangelism? If it is so flawed, why does it often work? You're giving hypotheticals. I'd like to hear your own experience with atheists.Pascal's Wager is very flawed and unconvincing to an unbeliever. First, it assumes a false dichotomy of belief in God or no belief in God. There are other options. What is the Islamic god exists? If you believe in Christ, you could wind up in Islamic hell. What if a malevolent god exists? He could send the Christians to hell just for fun. Just a few possibilities. Plus, would God not see through one who chooses him to hedge a bet on eternal destinations?
What you have missed is that the discussion is only between an atheist and a Christian, not a Muslim, etc. However, if the atheist wants to postulate any other god, such as those you've postulated, he still loses, since he has then been forced to admit some kind of god. If the atheist brings up the Muslim Allah as a refutation, he still goes to Hell, but you have a chance at Heaven. As for a "malevolent god," no religion believes in such a god. It simply doesn't make sense, since all religion is based on pleasing that particular god and being rewarded. Either way, the atheist loses.