Walk around collecting prime on a dino, then whilst doing this, look out for compys. When you find some, knock them out and use the prime you have been gathering, works best with Rex,gigs,quetz,allo,wyverns , argy and dire wolf.
I found a level 1(by chance), and it took me 14 seconds to tame. I found thirteen more over the month, and by February(found my first one at January), I had an army. I took down a whole Allosuarus in seconds with the army, but we had a PVP war, and..........eleven fell to my enemy's Trexes and Baryonyx. Only one remains now, and I keep him in my ark Basement. His names JasonBourne