For your Shaman you are on the right path. SCHW and Poison Wind Censer will give you the best bang for your buck, aside from the expensive stuff already mentioned.
I don't play druids, so I am not as helpful there. Mana items are always good, and a
https://wiki.project1999.com/Luminescent_Staff would help with soloing. 6K is pricey for you, but still cheaper than the expensive Shaman items.