1. jump from the bridge to the corner, leaving the stairs out. It can be done just by an ordinary strafejump and a slight mouse turn in the end (demo).
Jump 2
2. come up to the very edge and make a long strafe-jump to the bridge moving your head slightly. You can also make this trick just by long jumping-about (demo).
Jump 3
3. come up to the column and make a plasmajump. In the end of this maneuver move back and you’ll be at the bridge (demo).
Jump 4
4. come up to the wall and make a plasma jump, in its apex make a right slightly. Red armor is yours (demo).
Jump 5
5. climb up the stairs, make a short starting and a side plasmajump along the wall, stepping back in the end (demo).