Why not go to Haven if we've been playing for so long... we can stock up on artifacts that reduce the opponent's luck and increase our own, and then we'll see how a knight without luck will fare...
Added 2 minutes ago
Original artifact options: a cloak that reduces defense and luck by 2, and a ring that reduces luck by 2. And for ourselves, of course, the skill itself and the lion's crown would be desirable... the main thing is that the opponent is left without luck, then even paladins will have a hard time!
