Aery or Kleptomancy for Nami?

I've decided, with the new rune system, to come up with my own setups for the champs I play rather than looking at sites to see what would be good or not. I decided to check places like lolking to see how similar they were, and for my other champs they were pretty much the same apart from one or two minor differences. With Nami though, the runes are completely different. I started with Glacial Augment because I figured the CC would be good, but I didn't really find that it had much of an effect, so I switched it to Kleptomancy instead. What I thought would be good is:

Kleptomancy Biscuits Magical Footwear Cosmic Insight

(Resolve) Revitalize Font of Life

compared to their suggested list of

Aery Manaflow Band Celerity Waterwalking (I see this one on a ton of champs, is it OP?)

(Inspiration) Future's Market Approach Velocity

I haven't really considered Aery because I figured it'd be more suited towards Janna and other champs that revolve primarily around protecting the carry, rather than hybrids like Nami. Am I missing something in that I should be building her with MS in mind instead? I've always thought that CDR and mana conservation were more important.