Okay, here I am ranting on again, but here me out:
Stop the magic! Just say NO. And say D.A.M as well (DMs Against Magic). And you can be M.A.D.D. too (Magic Absent D&D)! (Old school reference, intended to be humorous.)
Okay, now that is out of my system for a few seconds, on to the more helpful suggestions:
If one is going to have alternate energy sources, make them all psionically accessed and psionic in nature.
Thus they all become psionic locations, touchstones, and psionic type power sources. They can still have side effects, but by making them come under the psionic system, it resolves the whole defiler/preserver dichotomy and keeps the uniqueness of that system.
Psionics already has Stygian powers, with a slight expansion, it could easily cover both the Black and the Grey.
Possibly replace the Sardior powers with Cerulean ones, and that might be the start of a workable chassis.