So I did end up playing the trio of bultungin into a Family crew. I definitely learned the lesson the hard way. I was still able to get the win, but the bultungin went down fast as soon as they left cover. At first, it actually seemed like it was going to work. For the first 2 turns, I moved them as the very last activations in the crew, and they were able to get right up on Santiago. At first, I was able to use the Old Ways effectively to stop them from going down. Then I was able to toss Santiago around for 2 activations to remove his focus and shielded, but then my opponent was able to A Por El some extra shots my way and they just dropped. Luckily, the 3rd was able to score me a point for Symbols and even take out a pistolero before it croaked. Though the crew was very fast, I definitely felt I would have been better served with the Rex or Emissary, than the 15 stones on Bultungin.
I also think that if you can keep the bultungin moving as the very last activations, that maybe more use could be got out of them.