can you give the name of the piece and the measures? was thinking it looked like a liszt ballade. sometimes you can use the pedal and pretty much do what you want, but smoothness is achieved by working the fingerings out. was thinking of looking through my books. sometimes comparing editions helps.if it is liszt, you might try cortot fingerings.
I'm normally a fan of using the 5th finger - hence my preference to use it on the way up, where 5 is on the C. However, on the way down, using 5 on the B means a change in hand position from 5 on the B to 1 on the A, which isn't my favourite position switch when it is required from one white key to an adjacent white key. I much prefer switching from a black key to a white key on downward runs, as is evident in the red fingering.