Decoys do little more on a Jedi Training mission than on a Diplomacy. Decoys are meant to be used for offensive missions(Sabotage, Espionage, Incite Uprising). Any missions you do on planets you already have control of need no decoys. Typically the only way missions on your planets can be foiled are traitors or assasination attempts. Subdue Uprising I'm not so sure about. I just usually take Thrawn and the other leaders aboard the orbiting fleet to perform the mission without decoys. I don't think they help. Back to Jedi Training though. As the Empire I do not train Jedi. The message comes up, I just say "That's nice" and remember the name. Vader is too valuable to lose for 150 days. As the Rebellion though, I don't value Luke as much. He may be an okay diplomat, good saboteur/spy, but I have enough of them. I'll send him away for those 6 months. I just send Luke as I find the sensitives. I don't wait for a pile of them. Then, if you do, you are without a huge chunk of your personel, plus, with my luck, It takes me longer than the time it takes to do the training to find the sensitives. I really don't usually bother with Force Sensitives all too much.