Lol I was able to farm at tanor/aligator only after 110 with feoh with crappy gear as +3 artifacts and limited gun +12 , blessed exalted set +10,
Mana barrier does more harm than use , mobs drain mana fast and u die without mana ,
I'm 113 now and I still farm in tanor/aligator as all above zones drains mana with shield and I just die or just die without shield anyway