OOC II
There seem to be plenty of us. I figure some can try to take out the archer. Even if they fail to, they make a good distraction for the others as they approach from the opposite side with the ladders.
While stealth is always a good first attempt, I'm not too worried if that alarm does go off. After all, no one came out of the gate last time. Even if they are left waiting for us, we'll have height advantage on the roof top.