Gandalf vs. Dumbledore
I’m not going to beat around the bush here. In a duel between Dumbledore and Gandalf, Dumbledore would win. It’s not even a contest. Let’s look at all the powers Gandalf has, and compare them to the much more awesome powers of Dumbledore.
Shining Light: How is this even a power? Anyways, Dumbledore can just use the spell “lumos.”
Telekinesis: Summoning and Banishing charms.
Summoning an Eagle: Dumbledore has a phoenix. A flaming, immortal bird beats a talking eagle. Plus, Dumbledore can summon regular birds with the spell “avis.”
Calling up a horse: Dumbledore can apparate. Why ride a horse when you can just teleport?
Shooting lightning: I actually can’t think of a spell that shoots lightning. However, given that the wizarding world has a spell for almost everything, I’m pretty sure that they would have a spell for shooting lightning.
Making a magical shield: Protego. That is all.
Fire Blasts: This is exactly the same as using “incendio.”
So yeah. Dumbledore can basically do everything Gandalf does. Also, do you know what would’ve happened if Dumbledore was in the Lord of the Rings? The movie would have lasted two minutes, because Dumbledore would have apparated the Fellowship to Mount Doom, dropped the ring in the volcano, and then apparated back before someone could have made a pot of tea.
Oh, and for the people who say that Dumbledore would be powerless without his wand, that’s also not entirely true. In the third movie, Dumbledore uses a cushioning charm on Harry so that he doesn’t die without his wand. He can also set candles on fire without his wand. In addition, Gandalf can’t use magic without his staff either. When Saruman takes his staff and locks him at the top of his tower, Gandalf has to wait for a flying eagle to save him.
So, not only can Dumbledore do everything Gandalf does, he can also do about a thousand other things, such as making potions, transfiguring objects, teleporting, reading minds, and stunning five people at once. So, that’s why I think Dumbledore would kick Gandalf’s ass in a duel.