If you’re in a hunt of Megaloceros and you wanted to tame it, always bring a bow and tranq arrows since it is the most effective and cheap way to knockdown a big daddy reindeer like that. Another tip is hit the head of the Megaloceros so that the torpor effect will trigger quicker than the average and it will knock him down quickly so he doesn’t have time to run away from you.
Easy tame, just use bolas, trap/protect it with spike walls, feed berries, and use narcotics/narco berries to keep torpor up. I play on a small tribes server and tamed a max level in less than an hour with 3x.
Deers are easy to tame because all you need is to find a good level deer and bola it and punch it out or tranq it or club it. And feed it meoberries. Also narcotics or narcoberries to help to stop it from waking up.