Check out ArmyForge, an online Epic Armageddon list generator system. They have official lists, NetEA lists, EpicUK Lists, FERC Lists. I worked up my heresy era force to find that it sits at about 6000 points. Only found squats in the French lists (FERC) but they are totally in french so will need some work to figure it out.
I am sure all the Epic players no about this site but others should check it out and dream of building truly massive battles that are tactical unlike Apoc.