The whole process is spamming buttons. Using your GP 100 at a time on unearth or leaf turn, you will get around 5:1 NQ to HQ.

Want a stack of HQ? Spam nodes until you have 500 NQ, you will get 100 HQ. Keep the NQ, vendor it, discard it, do whatever.

That might sound kind of dreary but that's what it boils down to.