Which antenna would you recommend for a base station in a somewhat urban area?

cross-posted from: https://gregtech.eu/post/25654151

Basically title. I'm in the EU, so I need a 868Mhz one. I need it to be weather-resistant, because I'm making an outdoors node. Cost and size are not an issue. I plan to mount it relatively high.

I'll most likely install it on a Heltec T114.