For the past couple of months, the entire dueling system has been extremely busted in a way that makes it sometimes unenjoyable. The amount of damage that spells can do is too ridiculous a casca headshot with good gear will do around 4.5-5k dmg and most graduates have around 9k. This also goes for other spells like Flamonstrum, Conflamrus, and Ignatium as well. The amount of dmg that can be gained has to be lower to an amount so that way things like getting 2 shot don't happen. In turn for dmg being reduced the amount of healing would also have to be reduced. Another spell that needs to be reworked is Incarcerum. If you combo Incarcerum with expellimo the person that is standing there cannot move at all for however long your incarcerum may last. This means that they will most likely die no matter what they do. You can counter this spell, but in team duels when every dmg player is running incarcerum then you will most likely die. The final spell that may need to be changed is fortificus. Every duelist on potterworld runs fortificus because it is one of the only ways to survive getting 2 shot in duels. I suggest looking at this forum post because I believe this Fortificus Change is good.
and like Sicktrees said - It's too ingrained now to change 
