Haha, triangle.gs is great! They also have another program called kickback where you can PvP to win money. Although there is a 6000 people wait list, if you're good enough, you can be invited (like me ).
When you open essentials, hold ctrl and press f. Look for per-warp-permissions. Set per-warp-permissions to true. Now add permission nodes to each rank. essentials.warps.<warpname>