Bandits are easy, just a standard line formation will deal with them.
Undead I enjoy fighting, tons and tons of them and we just hack them down. Haven’t had the higher levelled ones yet though.
Werewolves are easy as well, solid shield wall/spear wall and riposte. Cut them down and keep that defence up.
Orcs? Ugh, I’ve not had fun with them as I’ve had them thrown at me in the early game quite often now, particularly in missions. Luck of the RNG I suppose. I can usually do ok at the start, block them in, stop them charging, stab them a thousand times, but once they decide to their OHKO Off with their heads attack that’s it, game over.