You never know what are people attracted to and attractiveness is kind of subjective. Let's see, minorities (other races than white) tend to think "whiteness = attractiveness", so if you look more "European" (aka Nordic), you are going to be seen as more attractive in their eyes. Western culture praises tans, so paleness is seen as unattractive. Ik, Ik, lot of talk, but you get my point. You can always give it a shot and see where you get (unless the obvious of a Bad Luck Brian getting with a look-alike of Angelina Jolie).
There is none. You see a girl you're attracted to, you make a move.. She'll either like you or reject you. This talk of "leagues" is a fake thing society talks about to try and separate people and stop people from progressing... It doesn't exist.