F2LL (which is also called the Winter variation) is a set of algs which allows you to orient LL corners while solving your 4th pair if this pair is connected. If your LL edges are oriented it will give you an OLL skip, if not it could give you a fair OLL. I have to say that there is another way to save time on this step without learning any algorithm : learn what OLL you get when you insert the pair basically( doing it with R U' R' or U R U2 R' often gives you a case easier than the other).
 | ( U R U' R' U R U2 R' ) |
 | ( L' U2 R U L U' L' U R' U2 L ) |
 | ( R U R2 U' R2 U' R2 U2 R ) |
 | ( U R' U' R2 U' R2 U2 R ) |
 | ( R U2 L U L' R' U2 L U L' ) |
 | ( U R U2 R2 U' R U' R' U2 R ) |
 | ( U L' U R U' L U2 R' ) |
 | ( U' L' U R U' R' L ) |
 | ( U L' R U R' U' L R U2 R' ) |
 | ( U R U2 R' ) |
 | ( L' U2 R U' R' U2 L U R U' R' ) |
 | ( U L' U R U' R' L U' R U' R' ) |
