Overseer Sadi-Belai one of the three extra bosses you have to eliminate for achieving master rewards in the Kodonur Crossroads mission. Tips: aggro bad, pulling good. in this mission, the group of enemies you see on the radar map are the ones you see “at the moment” others groups will spawn very fast once combat is initiated so watch out, and picking a good spot to initiate combat is also vital to your survival. 

click for big map.