I would use 5 4 2 1 on the last two sets.It's easier.
I would use 5 4 2 1 on the last two sets.It's easier.Don't hold onto the notes - as soon as you play one, let it go, moving your arm towards next note.
Additionally, it is important to remember that the accent falls on the first note of each set. The temptation is to roll them down and put the emphasis in the thumb, which is a heavier finger in any case. This not only sounds awful, but impedes your progress because you wind up playing a cross rhythm with the left hand, which throws you out.
You should use the same fingering unless there is a good reason not to (without seeing what happens next I can't tell for sure, thought though the F looks to be tied on), that way you get used to the one pattern.