What is the best wide-angle lens for Fujifilm landscape shots?

I am literally leaving for my dream trip to Iceland in like twelve days and I just realized I do not have a proper wide angle for my Fuji setup. I've been using the 18-55 kit lens for everything since I got into the system but I know for those massive waterfalls and hopefully the aurora I'm gonna need something way wider than 18mm. I'm shooting on an X-T5 so I want something that can actually handle that 40mp sensor but I'm totally torn between a few options and the clock is ticking.

First one I'm looking at is the Fuji 10-24mm f4 WR version. I like that it has the weather sealing because Iceland is basically a giant rain machine but I'm worried f4 isn't gonna be fast enough if I actually catch the northern lights. Plus I've heard it's a bit soft on the newer sensors compared to the primes? Then there's the 14mm f2.8 which is tiny and apparently super sharp but is 14mm wide enough for those huge landscapes? I feel like I might regret not having that 10mm reach when I'm standing in front of Skogafoss or something.

I also keep seeing people rave about the Viltrox 13mm f1.4 and the price is amazing like half of the Fuji lenses but it’s huge and I dont think it has real weather sealing? I'm gonna be hiking a lot so weight is a factor but I don't want to ruin a lens because of some sea spray or rain. My budget is capped at about 800 bucks used or new and I really need to pull the trigger by Wednesday so it gets here in time to test it.

My priorities are basically:

• weather resistance is huge for the rain
• sharp enough for the xt5 sensor
• light enough for 10 mile hikes
• fast enough for aurora stuff

So yeah I'm basically stuck between the versatility of the 10-24 zoom vs the speed and sharpness of a prime like the 14mm or the Viltrox. Is the f4 really that bad for aurora shots or should I just suck it up and get a fast prime? Does anyone have experience with these on the 40mp sensor specifically?