I think I use Alex Lau's style of LSE. I might make a video about it. Basically I either do U2 or U2' using right and left double flicks, and do U' using my left index and U using my right. For M' I push the DB edge with my left ring or middle (whichever works better for the specific case) and for M I push DB up with my left middle. For M2, if it's the last move of the solve, the I'll just doubleflick it but if it's in the middle of LSE I'll do something like r (M' R') because there is a 50% chance that the next move will be a U' in which I would have to regrip if I doubleflicked the M2. Doing r (M' R') helps with the fluidity of the LSE, and it's fast.