F2LL

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).

2 Corners oriented

1 Corner oriented

0 Corners oriented

3 Corners oriented

( L' U2 R U R' U2 L ) |

2 Corners oriented

( R U' R' ) | |

( U2 L U' R U L' U R' ) | |

( R2 D R' U' R D' R'2 ) | |

( R U' R' U2 R U2 R' U' R U' R' ) | |

( U' R U' R' U2 R U' R' U2 R U R' ) | |

( R U R' U' R U' R' ) |

1 Corner oriented

( 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' ) |

0 Corners oriented

( L' U2 L R U R' U L' U L ) | |

( R U' R2 U2 R U R' U R ) | |

( R2 D R' U R D' R' U2 R' ) | |

( U R' U L U' R2 U L' U R' ) | |

( U R U' R' U R U' R' U R U2 R' ) | |

( U R U2 R2 U2 R U R' U R ) | |

( R U' R2 U' R U' R' U2 R ) | |

( R U R' U' R U R' U' R U' R' ) |