I read other players tips for taming him at 110, but none of them worked for me. I tried going completely armor less, with a level one bow, and ended up killing him. Many people suggested using the fruit basket toy, but I didn't have it, as I didn't build the inn at my garrison. The other day, I was flying around Ban'thalos for the hundredth time, no armor or weapons, wondering if I should just give up on my dream, when I remembered something important. Whenever I attack anything that flies, my pets will sometimes levitate for a few seconds to reach it. However, my dire beasts NEVER do! They always stay on the ground. With this realization, I dismounted midair, and hit the dire beast button. The dire beast floated straight to the ground, never even touching Ban'thalos, but it got his attention! I disengaged before hitting the ground, and by the time Ban'thalos came down, the dire beast was gone! All I had to do was hit tame beast! 
YAAAAY! Words cannot describe how happy I felt at that moment!I decided to post this here because I haven't seen any other post describing this as a way to tame Ban'thalos. I hope this helps any fellow hunters still trying to tame him. Keep trying, and NEVER give up!
