True Jedi at 40,000: Well, first of all, ignore the Emperor for a bit and run around and clean up, first. You won't get the total, but you'll get close, so you can focus on fighting him, and when you get access to new areas, take the opportunity to explore. Don't forget that Vader has Sith Force powers that can access what a Jedi's powers can't. You should just make it. In the part with the lightning floor, definitely wait until you chase the Emperor off to Sith Force all the red lights. You'll get a good amount of studs from that area.