Oh, this trope is one of my favorites in fantasy novels! The 'banished prince seeking revenge' arc is like catnip for drama lovers. I recently read 'The Prince of Fools' where the protagonist starts as a spoiled brat, gets exiled after a coup, and spends years honing his skills in the wilderness. The revenge isn't just about brute force—it's a slow burn of political maneuvering and alliances. What makes it satisfying is how the character's incompetence gradually transforms into strategic brilliance through hardship.
The best versions of this story show the prince earning his redemption through genuine growth, not just power-ups. There's a manga called 'Beast Prince' that does this beautifully—the exiled royal learns humility by living among commoners before reclaiming his throne. The revenge feels earned because we see every stumble and lesson along the way. Personally, I always cheer when former fools turn the tables through wit rather than swords alone.