As they are only useful for their eggs outside of acting as an AC, the lower the level, the better it is. They are comparable to a Giga when it comes to torpor as it goes down extremely quickly, so be sure to constantly look at it and have a lot of narcotics at hand. Lower levels = quicker taming = less supplies and time spent. Darts are preferred as to not kill them. Can only be picked up by a Quetzal.
If you are struggling with hatching an egg (wyvern, rock drake or any dino egg) Dimetrodons are the way to go. Tame up about one or two and level up their attack and place the egg next to them, put your tames on passive becuase it could attack the baby. Dimetrodons can be found near swamps and some rivers to. They are hard to tame because their torpor drops low pretty fast, so good luck✨