Steal the attack plans of the Nerius Commander and Tactician. These can be found on a table in the tent where the Nerius Tactician spawns: ( 932, -0, -326 ) Copy/waypoint 932, -0, -326.
Important Note: To save time, avoid killing the commander and tactician as you will need to kill them for the following quest! If you do kill them, they will respawn - but it will take a 5-10 minutes.