I mostly solo as time permits, but I can point you to a few things that I have gotten or am working on:
in Stillmoon Temple drops the which has IH5 without the level 70 restriction.
If you're working on Spiritkin armor anyway, then the sleeves also have IH5.
...and if you're working on Spiritkin armor quests, then you have to get at least warmly faction with the quest givers, so you might as well do the quest for this nifty belt: .
Also, in the Murkgliders Hive Expedition in Draniks Hollows drops the . I haven't done this one yet, but as I understand it you will need at least 3 people in your group to get the expedition and the person who requests the expedition must be around level 60.