Easiest tame on Abberration for knockouts. Use a catapult and small trap(stops them from walking, they just spin around). Hit them in the back for good torpor. Once they start to flee(not fighting), wait til they pause to hit them one more time in the back for the win.
Tranq Arrows/Darts DO NOT WORK!!! To knock this out you need to use a catapult and shoot in only on it's back. If you shoot it on it's legs it will kill it. UP-VOTE SO EVERYONE KNOWS & TO GET DODODEX TO ADD THIS!!!