The quick and dirty answer to the wading stick question is the Simms multi-piece wading stick. The virtues are its dependability, weight, and overall convenience. I have used many types and makes of the multi-piece wading sticks, and for me the Simms wading staff is the best. It ain't cheap, however.
As some have pointed out previously here, the telescopic type are prone to failure due to dirt and grit clogging the threaded joints. As for the Folstaff, the bungy cord slip joint type often stick and are difficult to pull apart. And they are not cheap either.
Taking all of this into account and experience with these items, I like the Simms wading staff. It is strong, the jointed sections reliable and the overall convenience leave little to desire.
All things considered, be safe and wade carefully.