Higher levels are an easy tame, once you get it knocked out simply wait for the torpor to go almost all the way down and then pump it full of narcotics and camp the starve timer, you may have to give it a smaller dose of narcs near the end, but by waiting as long as possible to narc it you're buying piece of mind for most of the 20ish minutes it takes to tame

(This is a good start for Giga taming too)