No such thing as dueling anymore. Original mage dueling came from pre-UOR.
It has always been Mage/Med/Eval/Resist/Inscribe/Wrestle.
Back before the game went item based, you were able to "fake" people out by arming yourself in the middle of casting a spell and then cast another spell.
Dueling rules have always been No pots, not aids, stay on screen, wait for the wall to fall. declare additional rules before the duel begins.