I always spray one branch, always worked and it produces more pollen than you need. There are several benefits to spraying one branch, you can make selfed seeds with your other seeds. You also save cs with the one branch method, it doesn't take much and you are able to save a mama for harvest minus the branch you flipped.
I would never use the stress method because it could pass on hermie genes to the next generation. With CS you do not pass on any trait.
Seed Maturing times= Auto= 2-4 weeks, photo indica=3-5 weeks, Photo sativa=4-6 weeks