Just tamed lvl 196 from wyvern. Needs some patience as you land one hit at time (you can try 2 longnecks) , but it has one advantage, you can sprint after hit infront of quetz and change his direction as it tries to escape from you. Another option is to use low level slingshot to make him flee, for example from water to land. Either way you just fly infront and dismount wyvern to take a shot, you can even walk up his head, it's impossible to fall down. Don't forget to whistle wyvern on follow to stay in air.