Hello and welcome to the forum!
For 119, I use 4 on the turn like you and the scale is pretty similar except the end:
53 455345 4
For 121, I use the same fingering as you
For 123, I again do the same as you except at the end: 5345 345534 5
I think fingering choice for this has a lot to do with hand structure and personal preference. I feel it's easier to play the octaves fast for me with the fingerings I have chosen, but you need a relaxed hand and efficient movements to succeed.