Christians, what is your VERY BEST arguments for the existence of God?

[Tiberius]

You think this is a serious response to the Ontological Argument? The argument is logically incoherent.

No...I said (repeatedly) that the counter-argument is a parody *only*. It shows how the argument can be turned around easily to prove that God doesn't exist, by relying on the same faulty logic as the original.

You need to read some more philosophers of religion if you think no prominent philosophers consider it a valid argument - eg, Plantinga with his modal argument comes to mind.

Even Plantinga doesn't hold it as a good proof, he admits that due to his use of S5, it doesn't prove anything other than the being (God) is either logically necessary or logically impossible, leaving us no closer to the ultimate truth he set out to prove. His argument has other holes, which I already covered.