The doedicurus is great for stone and is one of the most useful dinos mid game to build a stone base. However, the doedicurus' weight is extremely low, so you are best off using a queztal (Center and Island) or a paracer (Scorched Earth) with a platform saddle to carry the doedicurus. The animal used to carry the doedicurus will not recognize its weight so u can mine as much stone as you want without having to make constant trips. This is easiest if you have two people but it can be done with just 1.
The doedicurus gather the same amount of stone being any level does not matter which level you tame it and is perfect for farming element in extinction if you do not have mana or giga to do an ele vein