I did JOGLE a few years ago in 9 days with an FTP similar to yours at the time.
I wouldn’t bother with speciality phase but would do sweet spot base and sustained power build.
On bike comfort after many back to back days will be your main enemy. Make sure you’ve refined your position and saddle and have done some conditioning.
Try to reduce the amount of faffing around during stops as this will significantly shorten your day.
Best of luck