I use my X-T3 with either a cage and monitor or just plain with the bare minimum. I'm just a hobby filmer mostly, believe it or not, filming my kids. I just use the whole stuff and try color correction/grading because it's a fun hobby. I will try for real projects anytime in the future when I tested enough.
Anyway, here is my current setup of the X-T3:
Swit CM-55C Monitor
HDMI Cable Clamp
Before that, I also had a follow focus which I sold, although I liked it a lot.