Hooray for patch drop!
Sadly Behemoth has shipped with a pretty game-destroying bug.
Enter traversal with the intent to do damage.
Immediately melee to cancel traversal.
Would like some chime ins here for others reproducing / experiencing.
But as of now you can sit on top of an incapped hunter and kill them outright in seconds, or incap a hunter in the first place with just the on-hit damage from rolling into a hunter.