You won't be using your weapons much past mid teens at latest and your killing speed or healing rate will be limited by mana regen over time instead of mana pool.
My rec?
Save that money for spells - at least 2 spell sets above your current spells. If you're going to spend money on gear, I'd focus on things like those 5/55 rings for survivability. Unlike a lot of gear, they will hold their value over time as you get more druid oriented gear.
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