Kristina's biggest mistake was in thinking that having an HII gave her power. An HII does not give you power, it gives you the potential for having power but it all depends on how you use it. She didn't know WTF to do with the damn thing once she got it and now is an even bigger target than she originally thought possible.
Also, on this show, ego will bite you in the butt quicker than a sand crab!
Best season premier ever on Survivor... and one helluva TC