He would refrain from arguing with anyone, including Jen and Kail. He would bite his tongue for the week he was HOH.
Meanwhile, he would nominate Jen & Kail. Hopefully neither will win the Power of Veto. He would then let everyone (except Jen & Kail) know, he wants Jen out more than Kail. People will respect that. So he would convince them if he had to, which I doubt, to vote Jen out. With that said, he should convince them that he was telling the truth last week and they better watch their back when it comes to Kail. He shouldn't force it, but he should try to convince the other's he was being sincere. Then, hopefully whoever wins the Veto (hopefully not Jen or Kail) will not use the power of veto.
He needs everyone to vote Jen on voting day. But he would vote out Kail. Hopefully everyone voted Jen, and later he would confront Kail and tell her he voted to keep her. Letting her think he was over the spat. That way, he gets Jen out, and Kail respecting him at the same time. No one ever has to know he voted Kail out. Including Danielle. What this also does is show Kail he was being
honest with her because there has to be 1 vote to keep her.
Then in a perfect world, Danielle wins HOH next week to campaign against Kail. But if she didn't, no one would be after him, and he could still try to find a way to get rid of Kail.
IMO, that would be the best thing he could do. If he is smart, he will. But with his negative attitude, if he doesn't do this, he could or most likely will blow his chance to win people over - again.
Evil - Are you listening?!