For M3 Shaft farm. Pair with Ogre with Means of Destruction and/or Some for the Road heavy weapon spam. Thank me later. Simple as that
Ghost Call should be farmable; Ogre is random. For a starting heavy weapon, farm the Freeman from the Warden in the Anvil.
Once you have extreme heavy weapon spam, Ogre becomes optional for grenade regen. Ogre + Ghost Call are also strong on their own