I saw that you need a few tips for extinction, and here’s what I did:

I started in the desert dome (well, first it was city but that doesn’t matter.) and I tamed a few things there, after I got the tranqs I went straight for the op velonasaur, he’ll kill anything you need, just make sure you have good stamina. (I put 2,000 stam on mine.) then once you get the velonasaur, you have a lot of power. But it’s not enough to do the drops though. (Maybe blue drop?) Anyways, that’s what I did so if you fine with starting in the desert or moving there or just going to get a velonasaur, then you can do those.

-Lamprey