It's a merge

I think the merge is going to make a huge difference in the game. Now they all have to form trust with other members of the tribe. Foa Foa are the underdogs in Aiga because they are coming in with only 4 team members, so they are most likely going home first. Now it's like every man for themselves because everyone is competing against each other for the individual immunity idol. I don't think Russell should have used the immunity idol because now people are catching on to his ways. Next week he is going to have to challenge himself to get the individual idol.

Intelligence

I think intelligence is necessary in this game because you need to be able to get everyone on your side. If everyone is on your side, you have a very good chance of winning or at least making it to the end. You have to be able to know who to trust and who not to trust. You have to have good instinct. I think right now Russell is the most intelligent player on the tribe.