I don't know who's in charge of the dododex stats but I had a 162 and with my servers settings it said it would only take 37 tranq darts. I used over 100 and I killed it before it got close to being knocked out.
Just a few tips: 1: Make sure to when taming bring lots of narcotics. They have high torpor but drain super fast. 2: If you can definitely use some sort of flyer or cryopod that can carry this because it is super slow. 3: Works as an air conditioner and gets better temperatures by upgrading melee.