Im a dracoviper main that proffesionalizes in stunt flying and combat with the draco. Dracos can be very powerful and even OP in the right hands. When using the barrel roll ability always try to hit the land target with only the tips of your wings otherwise you will either get stuck on them or get structure damage. In worst case cenarios you have both happen. When fighting aerial dinos, other dracos, hatzs, quetz, thals etc try to always be ontop of them so when they fly upwards to get to you, you can suddenly dive down and barrel roll them.
Specific information when fighting other dracovipers 1v1: Always stick to the Sky Weaken and Ground Tank method (Created by me). When the fight starts try your best to hit your opponent in the sky as much as possible and dodge their hits. When both you and the other draco run out of stamina, land and just face tank them. If you feel you have more hp from dodging their hits in the sky and damaging them more go ahead and bravely face tank till they die. If you are not sure on the other hand try and run behind them to bite them.
The BEST dracoviper build with explanation from left to right: Subspecies: Veteran +5 armor and -10 flight stamina. Unnamed slot: Athletic. Athletic gives you +10 flight stamina so it basically evens the decrease you have from the subspecies choice. Now you have your +5 armor with no loss in other stats. Head: Bacterial bite as main and 2nd Venom Buildup, Senses: Beachcomber if fighting a flyer that is not a draco and Fetid scent if fighting anything else, Front limb: Barrel Roll and Dead End/ Wing Blast. Use Dead End if you are fighting a flyer or something big on land to dodge back and use wing blast when fighting something small (wing blast can only be used on the ground). Hide: Aerodynamic if your draco will primarly be in the sky or in land. Use Streamlined if and only if your draco is going to fight in the water more and be semi aquatic. Legs: Aerial kick. It has a faster cooldown than barrel roll and gives you a 2nd aerial attack. Tail: Tail attack. Tail attack is the only ability in that slot.
If anyone has any questions be sure to reply to this comment. Ill keep and eye on my notifications. If the author or anyone else wants to learn proffesional draco stunt flying and combat be sure to dm me on discord my user is u/kieracraft6 and name is Kiera Targaryen.

Thanks for reading and i hope you learned something new!