https://i.imgur.com/fRjK0WM.jpg
It may be hard to see. However I camped for him for about 5-10 minutes (roughly) at the Vyragosa spawn (red dot)(lower west) I killed 3 Vyragosa's at that location. I set up a noodle cart let it run it's course and set another up - no spawn. I went to the cnter red dot (also noted stone pillar and sat on top of that for about a noodle cart and a half before I saw him coming up from the pink path. Those 2 locations overlap the most spawn points per location. I managed to get him at the blue dot as he was coming up from his path. It's hard to reach him from there but very doable. He fell onto the rocks out of loot range so I pulled a nearby rhino (also the phased out one) killed it near TLPD and looted the phased rhino and it gave me TLPD's mount as well. If you need any further help or have any questions feel free to ask, Happy hunting.
PS. Those colored rings are flight paths of TLPD I made it myself with reference from other maps.