Afterwards, head to the other side and take out the Hoplites and Centurion there then run forward and take the second left-hand path down the stairs. Jump across the platforms to a dead end with a Treasure Sphere holding 4x Tesla Turbines . Run all the way back, examine the Cie’th Stone if you wish to hunt the mark in this area, then take the other path upstairs this time.
Forming a barricade on the bridge is a Boxed Phalanx accompanied by three Hoplites. You should know how to deal with this threat sufficiently by now (kill the Phalanx first) so remove them and also deal with the Rust Pudding on the far side. Finally, a little further through the tunnel you can find 2x Saint’s Amulets just floating there. Keep following the path and eventually you will come out into a pretty little area.