1. Na perm:
(R F U’) (R’ U R U) (F’ R2′ F’ R U R U’ R’ F) (any position is ok)
Finger tricks: F/F’ (marked in red) by right ring finger. U/F’ (marked in blue) by left index finger.
This algorithm is 17-move length without requiring regrip. Although it has 4 F/F’ moves, it is not hard to turn them with index and ring fingers. Its last 10 moves can be made very smoothly.
The following 18-move algorithm is also good. Regrettably it has F’ U’ F combination which is not so easy as the previous one.
(R U R’ U’) (R’ U’ R U) (F’ U’ F U’) (R’ U2 F R F’)
The following 23-move algorithm is an almost 2-gen, and its F/F’ turns are pretty easy. I think many people is using it.
(R U R’ U) (R U R’ F’) (R U R’ U’) (R’ F R2 U’ R’) (U2 R U’ R’)
2. Nb perm:
(R’ U L’) U2 (R U’ R’) (L U L’) U2 (R U’ L) (any position is ok)
R’ U L’ combination is a little awkward. I begin with my thumb on U-face and turn R’ & U, then use left ring finger to move L’, keeping the basic position. This makes the trailing moves easy.