I use my Fujis for weddings too.
Moved over from Nikon gear. Still have the D600 with a 50 1.4, 85 1.4, 14mm 2.8, but am in the process of selling most of my lenses - Loved the 24 1.4 but no need for it now.
So what I usually take to a wedding shoot:
Fuji X-T1 with 18mm f2 on it. Not the most popular lens for the internet warriors, but I love it.
Fuji XPro-1 with 56mm 1.2 on it. Awesome combo.
https://youtu.be/EesMX4_EDLw
Nissin i40 flash. I only use this when I have to for the first dance. Most weddings I've been able to get away with zero flash over the last few years.
https://youtu.be/00FheRhSPTI
In the bag I keep a 35mm 1.4 and an X100s.
I have shot with the X100s at weddings, at the bridal shoot and really it's a winner. I only use it for 10% of the images if at all but it's definitely capable.
The Nikon D600… well I still have it for certain corporate work, sometimes the speed light just works a lot better when I have portrait work that requires additional lighting. I do love the Nikon FF stuff but the Fuji has just been so good, the image quality, the weight and the size is just spot on for me.
Oh I have legacy lenses and adapters to use Nikon, M42 and PK lenses with my Fujis too. Love it.
https://youtu.be/XdkhFi9BifQ