3.PF Gestalt build help

[iDesu]

So I've got a build idea in mind for a character who believes himself to be an aspect of death. What I'm going for is a character who weakens those around him with his very presence and eventually will have persistent (greater) consumptive field.

So here's the build I've got so far
Paladin of Tyranny 3 / Hexblade 4 (Dark Companion ACF) / X 13 // Dread Necromancer X

I've got the auras from P.o.T., the hexblade's companion, and I took the feats to get the binder's aura of sadness from Focalor. But I'm unsure of where else to go from there. For the death aspect I'm thinking of going Pale Master on the Dread Necromancer side, but only because I'm unsure of any other prestige classes that would fit.

So, anybody got any suggestions to make this character more... deathy?

[Novawurmson]

Knight of the Sepulcher (http://www.d20pfsrd.com/classes/alternate-classes/antipaladin/archetypes/paizo---antipaladin-archetypes/knight-of-the-sepulcher) Antipaladin (http://www.d20pfsrd.com/classes/alternate-classes/antipaladin) instead of paladin of tyranny? Talk to your DM about alignment issues if you want to be LE. Anti/Paladin is an excellent "passive" side to a gestalt in Pathfinder.