It all depends on Immunity, of course.

If, as many people feel, Kelly wins the first immunity, she needs to convince Rudy to vote against Rich or Sue. She needs to illustrate that Rich/Sue versus Kelly/Rudy in the final vote results in the Jury voting for Kelly or Rudy. In other words, Rich has to be up against Sue in the final vote because they are both (almost) equally unliked.

If Sue or Rich win immunity, they'll turn the "Alliance" against the more popular Survivors. Most likely Kelly because she's more popular with Pagong, who make up the jury.

If Rudy wins immunity I hope he realizes that he needs Kelly around and votes off Rich or Sue.