I'm just thinking back to LOTR. I mean, Balrogs were nothing to be messed with. Gandalf basically just said, "yo, balroggy, you ain't comin' this way" and that was that. He didn't have to do anything fancy. Ole' 'roggy was just like, "Oh...er...uh...well then, I'll just...um...stand her and roar and look menacing then...and...uh...yeah."
If Gandalf and Dumblypie ever got into it, I imagine it would play out something like:
-Dumblewumble unleashes the fookin' fury with all he's got.
-While he's doing that, Gandalf sits down and has a couple of tea.
-When he's done, we walks over and clocks Dumbledweeb in the temple with his staff.
-Dumble crumples to the floor. Gandalf wins. Flawless victory.