So, played for a few hours in horde mode. I've learnt that it's a tricky game. Need to work on my movement, my parrying, my attack, gear location, which gear I prefer, tactics and in general, git gudness.
Found a nice spot, that if you can get enough cash, you're fairly well off, given the AI can't climb, and there's a longbow+ammo. A few people can easily get through the waves.
Definitely enjoyable, now just need to keep practicing. I think Horde mode, whilst fun, may be a bit too hectic for me.