Well it's been a couple of years, so I don't remember the specific reason, I think he just didn't want the added complication of extra dudes. We were playing Shackled City, one of Paizo's pre-Pathfinder APs. We pretty much broke it wide open thanks to the changes in item creation between 3.5 and Pathfinder anyways, and I was able to get an Improved Familiar eventually, which ended up being a Storm Elemental from Pathfinder which also tended to break things open thanks to it's crazy bonuses versus things wearing metal.