My main ally was Chase, and we aligned with John/Brook, because we're all friends outside the game.
Chase and I tried to get Jill and Yve together and put the four of us in an alliance.
On top of that, there was a sort of unofficial deal between Jake, Ken and myself, because we're all from Greece.
There was the Palena alliance of Me/Chase/Russell/Dan/Wendy/Marty.
Then on Atacama, it was pretty much just Chase and I + Yve deciding which people we liked the most.
Then at the merge there was the "Atacama alliance" which apparently fell apart.