Intelligence

Laura is very intelligent in the bodily/kinesthetic and interpersonal departments. In challenges she is agile and quick, probably the strongest girl where athletic ability is concerned. For example, in this episode she moved quickly and was very well-coordinated when putting the pieces into the puzzle.
Laura is helpful at the camp and does well in challenges, which make her get along well with her tribemates. She gets along so well with Kelly and Monica that she actually seems to have power over them, which helps her in the game. These traits demonstrate her interpersonal intelligence.
I think the most important intelligence in this game is interpersonal. You have to do your best in challenges and when working around the camp, but mostly you have to make good relationships with the other contestants so they are less likely to want you voted off. Russell has succeeded so far in the game because of his interpersonal intelligence, since it allows him to secretly control some of the people. Now that the tribes are pretty much equal (if Shambo is on Foa Foa's side) I don't think Galu is as strong. If Laura gets voted off, Galu will definitely be at a disadvantage in the future. However, I can kind of see her making it to the final round. I think Mick is perfectly capable of winning, as long as he stays focused and builds up his motivation to win it all.

The Merge!!!

I think now there will be a little less comeradery among the former tribes and each person will have more of an "every man for himself" attitude. Even though they are all one tribe, there are no teams anymore so each contestant has to compete against everyone else. When they vote people off, they will no longer be thinking in the best interest of the tribe and voting off the weakest; instead they will probably want to vote off the strongest in order to give themselves a better chance at winning Survivor.

After watching this episode, I think that for the most part, the Galu tribe has fully accepted the Foa Foa members into their tribe and are willing to take their opinions when it comes to voting people off. Erik was probably the exception, because he felt that the Foa Foa members had nothing to offer Galu; he was still competing against them even though everyone was one tribe now. When the other Galu members agreed to vote off Erik though, I think it showed that the other Galu members are not all out to get Foa Foa. I think some of the Foa Foa members still have a chance at getting far in this game, even though they are outnumbered right now. I guess we'll see....!

Intelligence

You definitely need intelligence to be able to succeed at Survivor. Some of the challenges require the contestants to think quickly and logically, and the better you are at it, the more likely your team will win immunity in the challenge. Also, you will be valued in your tribe and less likely to be voted off in Tribal Counsel when your tribe does lose. Most importantly, you have to know when it is safe to trust other tribe members, and which ones you should not rely on. Russell is very good at getting along with people in a way that makes them trust him, and he succeeds at controlling them. He is intelligent (logically) enough to know who to vote off and when, based on what will give him the best chance of being the winner of Survivor.