The best one ever was a folding saw that had a screw in female end on the handle to fit into a painters pole and would also take a sapling or limb screwed in real nice for those trips w/o the pole. I can't find them anymore so I made one using the handle off a paint roller, a folding saw, some work shop engineering and 2 part epoxy.
For tree stand pruning it is tough to beat. I carry the whole rig when out setting stands and the saw alone most of the time in the woods. Cut a little sapling or branch, screw it in and extend your reach.