There are speed-of-focusing problems with the Fuji, but being able to preview the image "in the viewfinder" makes for very fast shooting.
Evening photos were made with a Fuji X-T1 and a 10-24mm F 4.0 lens. Flash was a Nikon SB-24 with a Lumiquest 20/80 variant (mat white reflecting surface) triggered by a neutered SB-17 cable. Non-TTL automation was used throughout.