Surprisingly useful even when you've moved on to tame carnos and stegos, especially with some higher levels. A couple of mate boosted dilos leveled only in health can be great hunting companions, as their spit slows even the fastest dino to a jog that you can outrun easily. (Level health so that they can attack first before u do and take the damage for u.) With so many large creatures unaffected by bolas and bear traps being expensive and unreliable, dilos can be a good, if not great substitute. As a last resort, u can always let them slow the creature that's too powerful to kill while u make a run for it. : )
Dilo’s are mostly good for small enemies and leaving them on victim item collection and target and leaving them around a larger herbivores creature you’ve tamed like the teeth behind the muscle ready to pick up the spoils of war.
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