I think you're wise to bring a small secondary back up body. The Fuji will fit that bill nicely, although a second Leica body would also suit that need.
Remember: when you travel, count on the unexpected and things sometimes going sideways!
The only change I'd suggest is to bring a smaller 50 -- even a 1.4 or a Summicron. It'll cut the size and weight down, and eliminate the need for a magnifier...less stuff to lug around!
Also: how are you storing, backing up and sorting your files? I'd *really* suggest at least a cloud backup option. Hard drives, cameras, laptops etc. can go missing or get destroyed...Cover Yo' Ass!
"Viva Film Renaissance"