The benefits of using immature technology I'm afraid. Fuji flash leaves a lot to be desired.
They can be used, somewhat. Here is the current thinking on using some Fuji's with YN622 remotes from the excellent 622 user guide at...
https://docs.google.com/file/d/0B77OmmGIg0gMVFpqNkpBYXBHajA/edit?pli=1
Fuji Cameras
• Some Fuji cameras will work in Remote Manual Control.
• Fuji X100, X100S and X-E1 have been reported to work in full remote Manual output and Zoom control, in 3 groups.
• High-speed sync up to 1/1000s has been reported.
• TTL and 2nd curtain sync are not available.
• The 622Cs are set to Remote mode.
• Compatible flashes, like the 580EXII must be used.
• The above cameras do not need Custom Function 04 Legacy Flash to be ON. The function is required only when the C-TX erroneously thinks that it is on a full E-TTL camera.
• Care is required when mounting the C-TX on the camera to ensure that the pins ride up and seat fully.
• Press the Test button after changing C-TX settings to update the remotes, before pressing the shutter.
• See page 45 for more detail on Custom Function 04.