You'll have four total Saints to untie as well. Work around this floor, knocking the four charges off. After that, use the Sonic Boom - automatically equipped for you - to knock the first charge off the balcony. In fact, it may be best to just kill the enemies before untying the Saint to be sure you're clear. Don't take too long, as you're about to be pincered from both sides by STAG soldiers. A standard Saint is to your immediate left, and you can untie him to gain another follower. Once you reach the blue pylon, you're teleport to the top, and a five-minute countdown will start.
