Probably everyone figured out already that a Necromancer can have about 8 minions through the Lich form. So lets add a bit more fun to the mix:
2 runes of the flock summons a Bird, 4 runes of the ogre summons a Rock Dog and a sigil of Demon Summoning gives you an extra Fleshreaver. Sounds like fun.
Side effect are 75 power, 3% critical damage and 25 healing.