Nerfing toons to make quests harder isn't the answer. IMO these continual nerf to toons abilities is just Turbines lazy attitude towards new quests (i say new in the least terms possible as most "new" quests are cut and pastes) with virtually nothing new.
Turbine i have 4 new quests for ready to go for module 12. Waterworks Epic. Just roll out the standard, all mobs 10,000 hp, 65 AC, and throw in a few random effects like few pure fighter trogs with unlimited spell points and then u can call it all new.
But please don't change the reward system as things like eternal wands are very useful to the level 20 toons who complete these epic quests.