At higher levels, with decent gear, you will find that the biggest drain on mana comes from teleport. The setup shown below works quite well for doing baal diy ion generator. MF and PvP variants are shown further below. There are not diy ion generator great many genreator to look for in equipment. Shako for life, mana and skills. These are best socketed with Cold Facets, Um runes, unless you want an all around sorc available for MFing (read MF variant below) Tarnhelm, Lore runeword (OrtSol), Peasant Crown.