During my attempts to improve the ergonomics of LMCF, it seems clear that several edges piece must be solved at the same time as the corners. Years ago when WaterRoux was proposed, the idea was to solve Roux first block, and all the corners, in one look. Most considered that unrealistic. That would require solving 3 edges plus all the corners in one look, during inspection. An alternative, even more difficult, is to fully solve all four 3x1 columns in one look (all corners plus FR+FL+BL+BR edges). Again, most considered this nearly impossible. However, not long ago I was having a DM chat with WACWCA, who is a top 2x2 solver. He told me that he frequently can inspect three or even FOUR possible 2x2 solutions during the 15-second inspection time, and then, choose the solution that is the fastest of all of them. This implies, almost without question, that indeed it would be possible to solve many edges and the corners in one look. Instead of inspecting 3-4 corner-solving solutions in the inspection, the solver chooses only the first one, even if it might not be the fastest. That leaves most of the inspection time to figure out how to either solve the 3 edges needed for Roux first block, or, for all 4 columns. Make no mistake; if any solver can solve either roux first block plus all the corners, or all the columns, in the inspection, I believe this almost certainly would result in the fastest method ever designed. Consider that Roux solvers solve 5-7 pieces during inspection, CFOP solvers that can do XCross solve 6 pieces; LMCF solves 8 pieces in the inspection, yet now it seems that solving 11-12 pieces in the inspection is possible. If it takes 1.5 seconds on average to solve the corners (top 2x2 average), the extra time to solve 3 edges would be quite low as move freedom is extremely high, and slice moves at the start of the solve do not affect the corner solution. Not unrealistic to say that in 1.9 seconds the solver could finish Roux first block and all the corners. All that is left now is an LMCF triplet (1.1 seconds) (for waterroux), followed by LSE, or LMCF pair (0.8 seconds) + LSE for columns. In the case of columns, LSE is the same as Roux (1.5 seconds), whereas if you choose the WaterRoux style, LSE is slower because the 2-edges on one side case, allowing 1.9 seconds. This predicts an average for WaterRoux of 1.9+1.1+1.9 = 4.9 seconds, and for columns, 1.9+0.8+1.5 = 4.2 seconds. The basis of this is the claim by WACWCA that top 2x2 solvers can see 3-4 solutions in the inspection. How they 'got' to that point is beyond me, but if true, opens a great deal of possibilities to solve 11-12 pieces in the inspection. Even if I am being over-optimistic in the splits, and even if you add 1 full second, it still predicts 5.9 and 5.2 second averages.