Have you tried this alg?
(r' D' r U2) x5
Its not the fastest and not for one handed but fun to execute and very easy to remember.
Same also as lefty for the other N-Perm
(l D l' U2) x 5
And as the algs are symetrical you can also use D instead of D' or the other way around if the fingertricks are better the other way.
I use one hand to turn the U layer and the other to turn the D layer
I don't really like the JPerms. I don't know why but that is the only alg I do AUF first to be sure I pick the right one.
Maybe I should work on my recognition for those