Mode: Battle Enemies
Enemies: Stormtroopers, Beach troopers, Imperial Officers, Imperial Shuttle Pilots, Cloud City Citizens
Find an area that is connected to three other platforms, so enemies can come in from all three sides, or move back and forth between a series of platforms, whichever you find quicker.
Mode: Collect Studs
I have tended to find power-ups in lone blue boxes. This one is spread out and takes a little bit longer. If you are playing as Boba/Jango Fett, just hover to the platforms instead of using the buttons, so enemies will not be able to follow you as efficiently
Mode: Stud Hunt
Hunt: 98,000 studs
Not a lot of purple studs here, but you don't have to get that many so it's alright