For Dark Siders: the easiest (warning: not much of a challenge) way to beat Master Vrook in Dantooine, is smply lay a whole bunch of mines (15) right in front of him. When the Merc Azkul talks to you, be rude to him causing him to fight you. Save here, so that you can try and try again if you fail. Once they start attacking, run to the lobby temporarily ignoring the fight. Vrook is just standing in the Lobby of Kuunda doing nothing. Just plant some mines right in front of him, and when you are ready to fight just keep shooting lightning at him. It took me about 20 seconds to kill him!