I have a bunch of Nandinas I've pulled from my yard too for a renovation. 2 clusters about 4-5' tall (1 cluster died or doesn't grow anymore after 1 year, so I threw it out 2 weeks ago), 1 giant cluster about 7' tall, and 2 smaller clusters about 3' tall.
My giant 7' tall one, I noticed the right half of the cluster/forest isn't leafing anymore, but the left side is very healthy and leafed. Will it stimulate new growth if I prune some of the leafless canes down a little, maybe down to one of the very few nodes? I've pruned those leafless canes down, took only 1' off the top, and the canes are still wet/green inside and look alive (yet leafless).
Or, are you supposed to prune the leafless canes all the way down to the soil? I've read a couple times, those canes are actually equivalent to side-branches on a regular tree, and should be pruned as such if dead (completely off to the soil level).