I have went as far as using a bow and arrow with a weighted tip i.e. with a bow fishing rig attached to an arrow, shot over an upper limb used to attach a tree climbers rope to the bow fishing string, pulled up with an attached nuc with brood comb, heaved up next to a very high swarm, to have the bees ignore it and later fly away anyway.,.
I.e. the weighted tip is necessary for the aid of gravity to pull the bow fishing line back to the ground because the tree bark on the limb will not let the arrow easily slide to the ground without that extra weight in my experience.
If I can't reach a swarm with my bee vac rig, which consist of a 16 foot pool pole, 10 foot step ladder and my reach from it work is at least another 6 feet, I don't bother with them anymore.
The bee vac is the way to go when retrieving high swarms in my opinion from experience:
Note: Robo described a way to use PVC sections used with a quality beevac (bee vac) that should be even better than my setup. You will find his description and explanation somewhere in the featured topic below.
Rey 3:Have you considered a bee vac for high removals?
https://beemaster.com/forum/index.php?topic=54531.msg496015#msg496015