As a mammoth user, i really wish they COULDN'T shoot air
The devs really did a good job of making every unit in the game as stupid as possible. Units always default to doing the opposite of what you want it to do. Let's say you send a laser squad to a tile adjacent to an enemy riflemen squad and an enemy orca. It will attack the riflemen squad by default. It gets particularly frustrating with the air attack ability of the mammoth. You send it to a tile next to an enemy talon and an enemy predator, and it will waste precious time attacking the talon by default while getting killed by the predator (no idea why it would prefer using its super weak weapon rather than its super strong cannons). It's like the units in this game can read my mind and opt to do the exact opposite of what i want them to do, the second i forget to give explicit orders. So interestingly, it turns out the mammoth would be a better, more useful unit and easier to use if it didnt have the air attack ability. Who would have thought!