Be sure to focus on the underlings when running into these guys. They're not really that dangerous if you're on a Rex, Thezi, Carno & even a decent trike can destroy these guys, just remove the underlings and their Alpha bonus is gone, making them no more dangerous than a small group of Dilos.
Don't get boxed in and you'll be fine and if you do get boxed in just be sure to aim for an underling, your goal is to remove the pack bonus off the Alpha, never had an issue with these guys, not even on foot.
There was like 15 allos near my base I thought I could kill them with my bronto turns out I was wrong they killed her and I didn’t even kill one. Thank you for all the adventures Joan R.I.P Joan 😭😭😭😭😭😭