That is a very good question. Unfortunately, we don't know what the Dumbledore's strongest spell is. I am sorry, but this question doesn't seem to have an answer, unless of course you ask J.K. Rowling.
Albus Dumbledore was hit by the killing curse, Avada Kedavra, which was cast by Severus Snape.
Albus Dumbledore's brother is Aberforth Dumbledore.
Albus Dumbledore was created in 1997.
Severus Snape used a killing curse on Albus Dumbledore.
No, Albus Dumbledore doesn't smoke a pipe.
The Hogwarts headmaster (Harry Potter books and films) is "Professor Albus Percival Wulfric Brian Dumbledore."
Aberforth Dumbledore is his full name. No middle name has ever been mentioned.
His full name is stated as Albus Percival Wulfric Brian Dumbledore.
Albus Dumbledore is master of the Elder Wand The Elder Wand's core is Thestral
Albus Dumbledore did.
Professor Dumbledore's full name is Albus Percival Wulfric Brian Dumbledore
Albus Dumbledore didn't release any songs.