For Jakobs the go to is the Crapshooter COM. With it…
- Hot Lead becomes amazingly good when Tombstone is up
- Trick Shot is one of her best skills, and you only need one point since the COM boosts it
- Eventually you’ll kill thing so fast that Ruthless will cause you to just spend time in your action skill with nothing to kill, causing it to take longer to come off cooldown when you reach the next group of enemies. And Trick Shot allows you to not rely on you AS
So as such I’d suggest this, but feel free to ignore it and experiment on your own.