Good for berries late game and or wood saddle is pretty cheap and is a all around good game upgrade its weight or health to tank turrets but a turtle is much better. It can be picked up by a quetzal so you can tame it at your base the attic isn't a very safe place to knock anything out.
Best way to tame is have a crossbow with butt load of tranq arrows walk backwards tranqing it as you go every now and then you need to turn around to get a bit further away. I know this works because i have three mammoths that i used this exact stratigy on
If you see one near a body of water get a aquatic animal and start shooting it with tranq arrows/darts while your in the water stay away from the land or the mammoth will try to attack you if your not on land then it won’t noticeonce it’s knocked feed it