Idk man. Im using imbued set od potency ( which brings mana up a lot). Only have arcane ring and belt thats worth with that. 41 lvl terra of potency ( since im still lvling ... working on planar and frost bow. As 43, my mana is 2k with nekro. Idk hows gonna be when i reach cap and put all items on.

Brutality items give you hp, potency mana. Some rogues combine it. Cuz u gotta have some average stats in hp, dmg and mana.