You dont need a fixed way to turn. Just do what is comfortable in the situation. For example in the H perm R2U2RU2R2U2R2U2RU2R2 you can use your right wrist for R2U2 then R with your left ring finger.
Or in the U perm R2'U'S'U2SU'R2 you can grip with thumb on UR and middle finger on DR so you can do S' with your thumb.