The advance solo is going to kill you. A lot until you figure it out, and then you might die anyway. It is hard. And yes like I said,you can use your merc in there. As far as the solo goes you have to watch and wait and move in when you can and get back out again. People like me who love games like Thief will have no problems with it once they slow down. If you can't slow down and observe what the guards are doing you'll never finish it.