This article was posted on salon.com on June 8 by Bill Wyman (not the former Stones bassist):

http://www.salon.com/ent/tv/feature/2000/06/08/survivor_strategy/index.html

Here's the part relevant to the final four:

"The last four castaways are the pawns in the true endgame. You need to be left with the most repellent person of the last nine, the castaway with whom you've been closest and the castaway with whom you've been second closest. (The more they like you, the less likely they'll be to conspire against you.) Vote to eliminate the last of these first; then, in the penultimate vote, conspire with the repellent person to eliminate your friend.

"You're then left with a dislikable person; with luck, this will be all you need to survive the final vote. It's possible that even your (possibly former) friend won't be able to bring himself or herself to vote against you. "

Couldn't any one of the Tagi 4 except Kelly see themselves as having followed this strategy thus far? The only difference is that Sue would see the "repellant person" as Dicque, while I think the rest would see it as Susie. The only reason Kelly still has a chance is the remaining ICs, but (E12 quotes aside) even she should want the "repellant person" in the finals.