I am intrigued by this promotion but its probably not something I can easily attempt as I am UK based, however the miles and limited status might mean JetBlue is a viable alternative to my goto virgin/klm/AF transatlantic flights in the future. I was awaiting a status match to YK when they shut down their million mile promotion which would have suited me as they fly from my local airport BHX (like AF and KLM).
So I have set Perplexity AI the task to find me a route using the spreadsheet. I'll share the results if I can get it to work. IF it finds a great routing then I might reconsider doing it.
I'm also now retired and while I dont have much of a budget. For a one off like this I can probably justify it in terms of the Craic and the rewards being even slightly better than the cost.

Happy challenge