If you can tame one, do it, but don't waste your time on a low level. Tame a lvl 135+. My tribe leader tamed a 150 male and there's just no contest. It doesn't have super high weight for wood gathering, though. For that, I recommend apprentice chainsaw or better with a thorny or beaver with you to reduce weight.

More Therizinosaurus Taming & KO Tips