A patch
of wanting is not singing successfully,
the adverbs of a spate are too like, well,
écriture fatale.
Not a style or technique I've ever heard of, but what difference does that make? That "well" is funny, too, as if he can't put it properly in English.
If you're in a patch of wanting you are indeed unlikely to be singing successfully. Good to have that pointed out. The question a spate of what is an example of him reaching the limit of this kind of writing, where there's so little frame of reference you come completely unstuck- unless he means a spate of patches - but I'm trying to interpret him, see? Easy to fall into that trap