L6EP or LSEP is a subset of LSE that permutes the last six edges, usually UF, UR, UB, UL, DF and DB, finishing the solve. Like LSE, it can be solved 2-gen with only M and U moves. It is used in Corners First methods and Roux. For the latter, however, EOLR + 4c is more widespread than EO + L6EP.
A variation of it called "WaterZZ L6EP", where instead of the DB edge, the FR edge is permuted, is used in the WaterZZ method.
- Solve the two D layer edges
- Finish the solve with EPLL
While this is easiest for solvers coming from CFOP, it is not very efficient.
- Permute UR and UL edges (Roux 4b)
- Permute the M slice (Roux 4c)
This approach is the most common as it is fully intuitive, very known due to the popularity of Roux and also pretty efficient.
One look L6EP
- Permute all six edges using one algorithm
While this is definitely the best approach in terms of ergonomics and movecount, it is rarely used due to the high amount of cases. However, since most cases are semi-intuitive, learning can be done in a similar fashion to EOLR or intuitive F2L.