The necromancer route, Dead Thralls. Two more followers, with Twin Souls, that you can equip. Preferably summoners themselves or a tank if you're a pure Mage. Equipped them with summoning staffs of your favorite extra dimensional critters. You have the best of both worlds.
Plus the dead Thralls are walking containers. Can't do that with twined elementals. If you're a looter, this is big.
Kill two followers with the ebony blade...
Necromancer or death knight, go for it - fun times! Muh-ha-ha-ha-ha.
But it's all about role-play. I also have a nord ice-priestess who's planning to have twin frost astronachs.
A demonologist (mostly fire spells) would have fire...