I can confirm on Mangler TLP server, the Sabertooth Tiger does exist in Trakannon's Teeth.
I just completed the stage for 'Revered Impressions' quest, Ogre cultural armor, killing 20 of them. They spawn on the South part of the zone between the old city of Sebilis wall and the grave yard of spectral npcs.
What I did: Brought a TRACKER. Again - a TRACKER. I stood just west off the flat terrain outside the city wall, and started killing everything in sight. My location was -1926, -586, -334. You have to spawn the little buggers. I do not know the place holders, so kill everything in the area. After several minutes, the Tigers started popping up on the tracking window. I had 4 up on track at one time, so there are more than just one place holder. I did not have any spawn where I was clearing mobs. I always had to run to some other area on the map near by. The pain in the rear is all the adds that you pull while trying to get to your prey. I spent probably an hour or two to get 20 spawns and complete the task for the quest.
I never had a Tiger kill up on the flat terrain near the city wall. They were always down in the hilly terrain. I did kill one right on the eastern edge of the graveyard of spectral mobs. So they can be out that far west. Like I said, bring a Tracker and save yourself a big headache.
Edited, Aug 10th 2021 2:58pm by Whiffleball