In reply to krikoman:
The deployment load of a professional shock absorber is 2kN (c. 200kg) and the absorber should limit the max load to 6kN as required by CE standard EN355. Depending on which standard your VF lanyard is tested to it could be the same, I notice Petzl test their VF lanyards to EN958 (which rather broadly covers all mountaineering equipment and I can't access to the detail of this standard to check).
Long story short, you should be fine to rest on either leg of your lanyard without deploying it. My Petzl Vertigo has an attachment point for a carabineer to use for rests on the end of the shock pack.
If you do add a sling for resting with, you must make sure it isn't attached during a fall, otherwise it will prevent the shock pack from working properly and transfer the load direct to you via your harness which would likely result in the reconfiguration of your genitals....