My gf and I have our own unofficial and are Duo running Lost Island PVE. We decided due to being so early game and the amount of carnivores being so high and resources being so low that a stego may be the way to go for a decently "tamed" encounter as for KOing and we brought roughly 50Tranq arrows and xbow each. We found a beauty of a level 130 and while we may have tamed her, we walked out with 1 broken crossbow, and about 20 arrows total.

Make a taming pen, aggro and run in, this will save you so much time and frustration if using Slingshot/Tranq Arrows. In the future we will build one for larger/beefier tames for sure. Bring minimum 75 tranq arrows for anything above level 100, if you don't use a pen keep at least 1 Stego length between you and your target tame and always for the head. When it runs, make sure to keep some distance so it doesn't loop around and begin smacking/man-handling you. Good luck, have fun and stay alive! UP SO ALL CAN SEE.

Tldr: Beware of high torpor. Bring extra ammo/supplies for knocking out/taming/surviving. Preferably build a medium sized ramp taming pen 3-high crows nest, 2 high walls and doorway for you to escape out of stone or better.