Dragon Quest Monster Super Light Android/iOS - Best Quests for Experience

In rough order of stamina efficiency

Stage Notes
10-4 If you defeat the formidable foe
12-3
13-1 If you defeat the formidable foe
14-3
13-5 Can find LMS here sometimes!
11-3
10-4 If you don't defeat the formidable foe
9-5

And at after that point I don't really recommend much.

--Thanks to The Mystical One for this info.