Any level up Ptera will do as the only stat you need to level up is movement speed. Good for getting around very fast.
A high level Ptera is recommended. Can be used to quickly transport resources back to base. I recommend leveling up weight to 300-350 and put the rest of the points into movement speed. 300-350 weight will ensure that you can carry a full stack of 200 metal, saddle and tools without being encumbered. Works great with an ankylo at the mining site or a character with high amounts of melee.
A high level Ptera is preferred. Level up stamina to 2k, movement speed to 160-180% and put the rest into melee. This makes harvesting prime easy as you can quickly fly it back to base before it spoils. Level up weight as needed.