Extremely easy to tame, use whatever method you want. Make an army of ten or more to defend your starter base, and use a feeding trough to feed them all. Keep growing your dilo army, it's easy and you can always tame more and more and before you know it you have hundreds of lvl 100+ dilos.
Tame a decent trike/parasaur and lvl health and put it on passive, then aquire several dilos set to agressive, then set them to follow thw trike/parasaur. Tada, a few of these and your base is pretty safe from snaller predators such as raptors, sarcos, compys, troodons, and if they are high enough lvl terror birds and kapros as well. Titanoboasa are still dangerous because of the narcotic venom