I was taming a lvl 20 the torpor drop is no joke. Bring at least 350 narcotics with and be prepared to wait if it's triple taming. Also if solo taming build a trap pen to pure it into with Windows. Make it out of stone they damage stone but it still takes them awhile.
Not hard to tame them. U must come prepared. You do the hunting missions and get one bow that has around 300 dmg if im not wrong. Use that bow with tranqs you need wayyy less shots. Build a raft trap with stone door frames. Make a ramp and lure it into the trap. Dont waste narcos to keep ot down just look for some cnidarias, kill them and use bio toxin. :)