Basically any combo that starts with tongue grab is a killer. As behemoth, I’m very confident in my ability to get strikes with it.
As for counters, there isn’t much since they fixed the thing where hunters could jet pack out of it. I do agree that positioning is key. Behind some kind of cover, rather than just far away. Something to block the tongue, or to at least stop you from going all the way to bob. Once you are at his feet, the only thing I can think of is jet pack straight up. But you’ll need like a full jet pack. He may miss his heavy melee, and you won’t be sitting in lava pools. Hopefully the medic can save your ass after that.