Why don't you push him to the Dark Side fully, brother? His antics will take the heat off of you, especially if he's acting out and killing randomly.

[It wasn't ideal, and they were likely to come into conflict since that seemed a Sith basis of operation. Still, it would peel Kenobi away as well, leaving his brother to really dig in.]

He won't be the first or last person I've punched unconscious. Let me be the aggressor, brother, so you don't bring harm to yourself.