Hello, this is my guide for TLPD / Vyragosa :
* they are on 8 hours and 3 minutes respawn time, (starts on despawn)
* they are spawning on the ground, not patrolling
* There is a big chance that Vyragosa will spawn on crash, on one certain spot ( at Brunhilldar village)
Will show u all spots i know; empty cyrcle is Vyragosa crash spot:
http://imgur.com/GY1rO1X