All algorithms are executed with a large corner in UFL

corner twist (UFL) (10)
U F2 L2 D' L' D L' F U' F

2 edge flip (10)
U L D R F R' D' L' U' F' = UF-RU-RF cycle

4 edge flip (U layer) (13)
F U F' L2 U' B' U B L2 U F U2 F' = supercube Z perm

Superflip - at least 18