Back when I first joined in 2011 on my hacked account, me and my friend would talk about and fear that at level 50 you would have to fight your teacher, until I realized we were fighting Cyrus Drake to get to Dragonspyre. I think maybe it could be a cool idea for a quest where your ravenwood teacher tests your strength, going into a battle with them. They have every spell you learn from them (level 1 - 88 spells), and they have the level 98 pet behind them. They could have cheats too.
Maybe your teacher could be a part of the Cabal at some point, and we would have to fight them to get rid of the magic that turned them into minions.
I think it would be cool battling Moolinda Wu tbh
Maybe Morganthe or Old Cob could turn your primary teacher into a boss minion and you have to fight them to relinquish the spell curse that is upon them.