Cross Bow Ballista Totem Build

When I listen to the cross bow sound in poe2 mercenary demo it is cool. Then I think if I put that on a totem it will be like a machine gun turret which would be awesome. But then I kinda think poe2 is a lot of using a first skill, then a second skill, then a third skill, then maybe a fourth skill to finally get to high damage. So with totems that might be hard to emulate. Maybe that is why ancestral call was changed because maybe they want totems to compliment non totem attacks, but a pure totem build might not be the direction they are going. I guess once more details come out, it will be easier to envision how we might make a cross bow totem build that is fun and cool to play.