Silver Tower Gaunt Summoner finished

Here's a couple pics of the Gaunt Summoner.  I finished him along with the Kairic Acolytes and Skaven Assassins (which were basically done), so getting close to working on heroes.  Does anybody know if you need all 8 familairs in the game, or are 4 all that's needed?  I'd rather just paint what's needed.

These pics were taken just before he was finished, but you get the idea.