Expert : Herkemer Oggdoddler, Black Root
Master : Sir Garrick Stout, Dernholm
The master quests for dodge and melee are related. If you plan to do both, it’s best to talk to the dodge master (and accept his quest) before talking to the melee master.
Regardless, to receive master training you have to “rescue” Lady Druella from the Gyr Dolour. (Stout will mark the location on your map.) The Dolour can freeze opponents, but otherwise they’re easy to kill. Once you’ve woken Lady Druella, talk to her and formulate a plan for killing Stout, and then kill Stout after receiving your training. Then be sure to get the cure blindness potion from Lady Druella before leaving.