The only advice i have for you is patience... the end usage is a pain at times, but if you've taken the fitness pool when you hit 41 go with energy epic pool and take conserve power and physical perfection for sure. double slot conserve power with recharge rates, and slot physical perfection with 3 end mods. you hit the mid 40's your patience will pay off and you can run yer dark tank/scrap pretty much anyway you want (PvE). You'll still need to keep a few blues on hand though. One more thing... make sure you slot soul consumption, your end recharge power, with at least 1 attack rate and 2 end mods.
my 50 dark/dark tank rocks for PvE.
