I use Bowdaar as my primary companion. Everywhere I go, he comes with me. When I first switched to Bowdaar from Corso, it did seem like he was a bit more squishy. I am level 36 now, and Bowdaar is simply a beast. Fighting a gold star mob, I can fire a few Charged Bursts before I have to top him off again. I honestly haven't tried Corso since I got Bowdaar though, and I am also two levels higher than the mobs I'm fighting.