The journey to Nerashi is very straight forward, as there is nothing blocking you from walking straight to her from the Sunspear Sanctuary, except a few stray mobs. You speak to Nerashi, then the prisoner (Kehtur). You must click "I don't have any more questions for you" to get final interaction with Nerashi. Then head north to destroy a group of 7 bowmen and free some Kournan peasants. Among these peasants are Dzawan, Megundeh, and Benera.