Really High Level Characters

So in the process of making something beyond an Epic level D&D character. More appropriately a Forgotten Realms character. He's currently at lvl 170 but I've got at least 6 more prestige classes in mind for him and that will push him well past 200. The funny thing is, I don't think he could kill a deity yet even a weak one. This ignores the fact that he is in fact easily over 100 levels stronger then even the highest level god. That divinity is a real plus giving 20 to every roll. Now granted, his attacks are stronger, his saves are higher (only rolling a 1 really puts him in danger, that's unfair btw, because that means he has a 5% chance of failure on any give save regardless of the fact his saves are all based at 80 or higher!), and he has more hit points. We'll see when he gets down. I really wish Bahamut was part of the Faerunian pantheon tho. Tiamat got in, why can't the god of good dragons? Besides there's no god of dragons in Faerun, who's the patron of the good dragons?