It's not hard to saddle pipe with a torch. Mark the bottom (deepest) part of the saddle and start there. Think of it like drawing a smiley where you start at the bottom and move the torch to one side, then repeat for the other side. I hold the torch angle at about 30 degrees pointing toward the end that will be cut off. It's a little hard to explain, but it's not hard to do once you see what the cut looks like. I wouldn't think about using a saw if I had many cuts on oil field tubing.