I use the R' U' one cause I love it and my slice moves aren't the best. I average 1.7 seconds with it and my fastest PLL's are 1.3 (both A's and both U's).
I wonder if I could be faster with the M move algs like what I do with H perm but I don't know if I even execute that one properly (if there is a "proper" way to do it.) I use my right ring finger for the M2' flick and I also use my right hand for the U2. Is this bad? Would it be better if I learned to U2' with my left hand for this alg? (I use U2' double flick all the time in F2L and in Bruno and some other cases.) Or should I relearn the finger trick in favor of some other technique altogether?