Second lamp has some rocks behind it. Jump on top of them n the thrall can't get u. Jump form there up onto the wall to your left(high jump needed). Once up turn left n follow the edge of the wall till u see a knight to your right. Kill him and continue up the hill till you come to a whole. There is a boulder just past the whole. Go behind it and up the left hand side back onto the wall. Follow wall to reach the plate. Stand on plate. Face away from the bridge and you will see a boulder to the left. Get some weight off at the lamp then hop on the boulder( move right to the edge away from the lamp or you will die when it blows up). Bad guys can't get here so while still facing away from the bridge u will see a lamp in the distance. Get rockets ready, the ogre will appear here so kill him and wait for bridge to form. If your on xbone I would be happy to run you through it but search YouTube as loads of videos on line and anyone who says this was patched is wrong as I was messing about the other day in there.