Killed one with a combination of ascendant compound bow and longneck and a lvl 495 spino with 1111.8 melee and around 11k health *this is after ark mobile spino TLC Update* took me around ten or fifteen minutes
Easily killable with a wyvern. Lightning and poison easiest down to longer range in attack. Just hover above and light it up :) killed my first today and it didn't touch me once. Just remember to watch stamina ;)
The fastest way for your entire tribe to rage quit is to have one of these randomly spawn in the center of your base. Oh, that doesn't happen? Think again, literally just did. What the actual f*** Ark??!!!