Ben and I have been working on another 1LLL alg set. Pure OLL, Algs that flip edges and twist corners without affecting permutation of the last layer. I'm going to struggle to recognize a few of these in speedsolves, but the majority are super easy to recognize and fast.
Another pure 4-flip alg I like: M' U2 M U2 M' U(') M U2 M' U2 M.
I also like F R U R' U' R U R' U' F' R U R' U' M' U R U' r' for Pi twist, but your alg is good too.
Another pure 4-flip alg I like: M' U2 M U2 M' U(') M U2 M' U2 M.
I also like F R U R' U' R U R' U' F' R U R' U' M' U R U' r' for Pi twist, but your alg is good too.
The pure OLL algs are for when the pieces happen to already be permuted. There's no point forcing them to be permuted first, because permute-then-orient is objectively worse than orient-then-permute.