You need 16 girls of the type you want the WS to be.
People usually do it this way: Let the Game auto set up your team for maximum power > Do manual adjustments for the first two teams (like lets say you change the girls in way to get a certain build, like skill activation, or crit, or evade / whatever thats your strongest really) because those two are the ones that will be pulling the weight in the fights so you want the best fighters of the type you need there, and then fill in the absolutely last two Teams with the basic 2/3/4* of the necessary type, even if they are low lvl.
The reputation doesnt really do much, it shows you that someone either like or hates your post for whatever reason.
I got bunch of that when I was talking and explaining about how bad the Nutaku business model and prices are so it can go either way