I have a necro mage weaver which is fun, template is 120 magery, eval, med, necro, spirit speak, spellweaving.
For summons I use Energy Vortex, vengeful spirit, and the summon reaper from the spellweaving mastery.
Other spells I use a lot, magery: bless, heal, greater heal, fireball, lightening, cure, energy bolt, flamestrike, chain lightening, meteor swarm.
Necro: corpse skin, wither, pain spike, poison strike, strangle, wraith form (leech mana from your target).
Spellweaving: word of death mostly, to finish off my target with high damage; but most of the spells have their uses.
Gear I went for spell damage increase, lower mana cost 40, lower reagent cost 100, all 70s resists, as much int, mana, mana regen aa possible.