Eccles Zaphardt, a gnemlin near the entrance of Maldura, told me that the Alcove of Reason and the Waterworks sections of the city have been locked down due to immolated invasion! In order to explore a possible connection between the threat within the city and the Primordial Malice, I must face them, myself! I should be able to access the Algorithm For Destruction through a door within the Sublevel Access Antechamber.
There is a workbench in the Alcove of Reason ( -70, 12, 173 ) Copy/waypoint -69.82, 11.50, 173.43 that is found inside the instance. You must use the zone's workbench. Personal workbenches will not display the recipe.
Note:You will need 8 Thaumic Coal as fuel for the combine, may bring more if you fail on a combine
Use the Sentry Shock Box XII on 8 disabled undertok sentries -- (inconsistent group update; check each character to confirm). If you get garbled speech from the sentries, speak with the Voice Box again.