I just tamed a 120 one.
What I did was I had 3 150+ Baby Brontos in cryopods and a high durability shield and stimulants in my hot bar. Throw the baby Bronto out of the cryopod (with cryo sickness) then let the Troodon out of the cage. Kite the Troodon around your unconscious tame and if you get hit eat a stimulant. (Stimulants prevent you from gaining torpor for a couple seconds as well as lowering your torpor).
When your tame dies throw out your next one and kite around it the same. Do this until it tames.
You need to do everything seperate because for whatever reason if it hits another tame at the same time as killing another one it will reset the xp gain and you won’t be able to tame it
At lvl 72 with flak armor on, a lvl 5 Troodon knocked me out with one attack at night. Last thing I saw was those glowing eyes before passing out. My Guess is that they attack vital organs. Luckily my Doedicarus was up for a game of baseball and launched that little devil out into the stands.
Those eyes, they haunt me even when its venom knocked me out, and is slowly picking off my pack of low-level Allosaurus. Now I have a Troodon... Yay... The Troodon was level 180. My pack of Allosaurus were around level 20. 6 Allosaurus died that evening.