For me the two tyre compounds that are available on XC tyres (so I’m excluding SuperTacky and VertStar) and work best on wet things are Schwalbe TrailStar and Maxxis 3C as a poor second.
3C works great as a rear on wet things very well though.
TrailStar works great both ends.
Great to have TS up front, 3C out back though.
Continental (X King BC PT / MK2 BC PT) is totally useless on wet things. I’ve tried to my cost, both in injury and my pocket.
This is only my opinion based on my own local wet conditions going up and down wet technical rocky / rooty tracks in North Wales. I like to clear technical climbs in all conditions when I come to them.
I’m currently running Nobby Nic SnakeSkin TrailStar 2.35s both ends. They’re awesome in the wet.
I race a couple of fun XCs a year on my Orange Five with outdated wheels. It weighs 13kg all in so not an XC rig but it’s a blast.