This item is the perfect example of bad game design. It's frustrating to collect these, because there's no way to gather them quick. I need 5 Spirit of Harmony by tonight, BUT WAIT there's no farming hot spots for these! In fact, there's absolutely no way to farm this item in a reasonable, timely manner... because every time a decent farming spot is found, Blizzard nerfs it to the ground. You're totally SOL when trying to gather these in bulk.
I understand that there's a farming spot at Zhu's Watch in Krasarang Wilds that's actually good, but that requires a particular quest to be on for these mobs to spawn. If you've done that quest already like I have, you're even much more SOL.
I can't buy these off the auction house.
I can't trade/mail these off my alts.
I can't farm these quick.
"But you can buy them off a vendor!" Yes you can. 400 honor for 1 mote or 600 conquest for 1 spirit? Yeah, no thanks.
Bottom line this item sucks and needs to changed.
At least make it account bound, it would lift the burden of having to participate in a mindless grindfest for hours.
*edit: I heard 5.1 slightly increased the drop rate, but that still doesn't change the fact that this item is NOT FUN to get.