Well theres your problem. You can do multiple epic lives. For instance, you could theoretically knockout 2 runs going 20-30 on r1 getting first time bonuses, there is more than enough quests for this. Then a third run on Elite and Hard bonuses, a fourth run using normals and slayers. Then you TR, it only takes about 8-15 hours of play time depending on how zergy I feel like being to go 1-20 again, then you knockout another 4 epic lives easily.
Ever thought about that? Instead of doing bad xp methods in epics, just reset them through a TR