⚔️Serberia

In short, try to keep Vesa alive. If he dies, you won't get any more leadership bonuses. You also won't get any discipline bonuses. I think that going into the tunnels will then be a guaranteed party wipe, as these guys, even without running away, could have wiped you out in the current battle. It wouldn't be without losses, of course, and Rohei could have finished off the remaining ones, but still. Even going into the tunnels with a full party might not be the best idea, as you will definitely lose Vesa and Alessia.