I'd argue that even the main halyard could/should be set up that way... much easier to hoist, esp if couple cruising, if one person can jump it at the mast.
They can't all be the same height, of course, you'll need to stagger them to avoid excessively weakening the spar, but between 5 and 7 feet up should allow most crew to get a pretty good jump.
Here's another idea: for the spinn halyard, run it through a mast-mounted clutch - then the mast man or even the foredeck crew can hoist it by jumping it, the clutch holds it while the pole gets properly set etc. When you have some time, pull the tail through to the normal cockpit-located stopper so it can be released from the cockpit on the douse. (don't forget to open the mast-mounted clutch, though!!)
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)