Use mana regen runes, especially in weapons. MO jewerely. Dont use mana after kill, it's useless after a certain level. Cube Sleep with Baal Throphy.
I'm currently in labs 13 and I've just switched them to +5% Enegy runes. Other than that, I've used Spiritual shrine crafts. Current setup:
helm: Dark pact. Not too great for a caster, and am gonna switch it now. Permanent Bloodlust helps with Prismatic cloak, plus double orb effect makes it top-tier imo.
weapon 1 - saggitarius. Frankly I think a godly craft would be better but it works for now.
weapon 2 - Vizjun monitor, 25% energy. I think dual Vizjun monitor is probaby best, other than crafts.
armor - Eire craft +2 skills, energy. Farming alternative - Elemental Disciple, free 30% mana regen.
boots - Megalith runeword. Should swap soon, but these are perfect. Mana regen, resistance. Maybe Spirit walker would be better due to mana regen - phys res conversion but I doubt it. Alternative, Erie craft. Didn't bother myself. Megalith is a basic runeword.
Gloves - Lorekeeper. + 3 skills and mana regen, all you want.
Rings- Empyrian bands. Ouroboros or Emp Glory would be better, but don't have them.
Amulet - Vizjerei. I rolled 18% energy on it.
I'll see if I can get a video uploaded.