Kalfie has a lantern but I do not think that would help. He also has two flasks of oil. We can take one make a fuse and light it and throw that in front of us. The splatter and the burning of the oil can make the same effects as a torch. May give us time to rush them.
Now that we know where they are firing from that side entrance we can rush them all at once and put a stop to the arrows. I say we rush them with me and wanderer in the lead to take them. What do you think? I think they can only get one more arrow off before we are on top of them.