Easy Rank Gaining!!!!!
Find a job wanting you to find an item in a hard dungeon and check if you have the recuested item. If you have it take it, take an escape orb, accept the mission and go into the dungeon. When you start, use the escape orb and voila! When you get out, the pokemon that asked you to do that mission will give you your reward and tons of rescue points!! (Works in Blue & Red rescue team, too) :)