thats unfortunate .... ive got dirty contact issues with all my fuji cameras , it sounds like extra cleaning with alcohol ans a small wooden stick on the battery and camera contacts might have been the remedy , the celluose of the wood stick is very mildly
abrasive scouring away oxidation
The 10-24mm is more versatile for some things due to the focal length, but as someone who shoots a lot of people photos and in lower light (weddings, events, etc) I'd take the extra stop of light gathering over the flexibility of the zoom.
I own the 18mm and 35mm 1.4. The 1.4 isn't the fastest autofocusing lens, and I wouldn't suggest it as a primary lens for low light event coverage, but for daytime shooting and low light portraiture, it's perfectly fine. Image quality is great, and it's an incredible lens.
The 18mm is an interesting option. Image quality is good (other than the extreme edges), autofocus is faster than the 35 1.4, and it's very small for an f/2 lens. It's definitely underrated - it's a good lens, it's just that the other Fuji primes are a bit better so it gets ignored.
The lenses you mentioned cover a very useful focal length range, and they're all great. If that's what you like, go for it - you won't be disappointed.