The Kaisertal with the climbing - base Hans-Berger-Haus is certainly a Mecca of the climbing scene. The Kleine Halt also undoubtedly offers some highlights of multi-pitches. Most of the multi-pitches are on the north and northwest face. Routes can also be found on the east face, the Totensessel, the west face and on the southwest side.
The Via Aqua on the northwest face is listed here as an example tour. Further tours can be found in the Alpine climbing guide "Wilder Kaiser" by Markus Stadler.