What do you do on these cases?
Scarmble: F' D' B D' B2 U B' U' B2 D2 L2 F y2
and
Scarmble: U F R2 D B2 D B2 D2 R2 F2 U2 F
The first one is when you a pair that when you put it in the right place, the remaining 2 edges are unoriented.
The second one is when you have two edges and two corners swapped and one other corner unoriented.
Scarmble: F' D' B D' B2 U B' U' B2 D2 L2 F y2
and
Scarmble: U F R2 D B2 D B2 D2 R2 F2 U2 F
The first one is when you a pair that when you put it in the right place, the remaining 2 edges are unoriented.
The second one is when you have two edges and two corners swapped and one other corner unoriented.