This is the layout that I'm looking to accomplish. Two lights connected to a two gang switch box connected to two more lights. One switch controlling the first set of lights, and the other switch controlling the second set of lights. The power is coming from the light with 12-2. Only the first light is wired so I'll be running all the necessary cable.
Run an additional 12-2 cable from the light box where the power comes in down to the switch box. (Or use 12-3 cable to connect those items).
The rest of the stuff including the second group of lights is wired up with single 12-2 cables.
The black wire of the additional cable (or the red if a 3 wire cable) is the raw power feed for the switches. The white of the additional cable (or white of a 3 wire cable) is the neutral for the second group of lights.
Do you get coverage you can count on? From the bag of fertilizer? From your lawn sprinklers?