Mistress Faye suggests all of you retreat from the cave back into open air. You can decide what to do once you're outside again.
Dan suggests Mistress Faye stay with Martelo where they are to guard the cave entrance. Dan, Aelric and you can take advantage of your momentum to follow the raiders into the tunnel before they can organize a defense.
Aelric suggests remaining inside the cave where you are, defending your position. Rest a while and decide what to do after you've had a chance to consider things a bit more.
You could shout out that the raiders are trapped and surrounded and will be killed if they do not surrender. Urge them to give themselves up.
You could leave Martelo alone as a lookout at the cave entrance. Tell him to shout if anyone approaches the cave. The other four you will head into the cave after the remaining raiders.
Some other creative option? (Please comment, below.)