Suggest eyeshadows to complete my collection

[Meisje]

I'm NC 15 (possibly a little lighter)! I have blonde hair and grey-blue eyes.

I have:
Creme Royale
Paradisco
Stylin'
Lucky Tom
Gulf Stream
Climate Blue (on it's way!)
Blanc Type
Omega
Brown Script

What shadows should I get to round out my collection?

I was thinking about:
Naked Lunch
Plumage
Vanilla (do I really need this if I have Blanc Type?)

I would also like something a couple shades darker than my skintone for a very light crease color, matte, but I'm not sure what that might be

 

[Meisje]

I would be very grateful for any help

 

[obscuria]

I would go with Kid for a matte shadow (I think it's matte...not sure though) a little darker than your skin tone or even omega with a light enough hand.

Some of my personal favorites are
Cork
Satin Taupe
Plumage
Expensive Pink
Sketch