We all know there are certain spirits that work well together:
Heat of the Wildfire and Stone Unyeilding Defiance can stack up enough blight from the box on the blight card that you can keep the island healthy for a full game.
Finder of Paths Unseen and Ocean's Hungry Grasp can let you drown problematic cities in the center of the board.
Spread of the Rampent Green (plus Vital Strength of the Earth) can help the Slumbering Serpent wake up much faster.
So what are some of your favorite combos? What spirits play well together?