Rank the Chopin Waltzes?

[hmrichter]

Title says it all
So I've heard a lot of debate on which takes the top spot, but is the common consensus the C#m one? (64/2)
If you finish even the easiest waltz, is the set a "self contained difficulty ladder" so to speak? (Meaning, if you finish one you can work through the rest without needing to go and learn other pieces first)
I could be dead wrong about this, I've played only the A minor, C# minor, Db major, and B minor.

[alistaircrane4]

The c#minor waltz is no where near the hardest! It is well known that the most technically difficult is op.18! Also you say you've played the aminor and dflat major ones but which ones? There are two waltzes in each of those keys. Heres my ranking-
Op.18
Op.34no1
Op.42
Op.34no3
Op.70no1
Op.post in a flat
Op.64.no1
Op.64no2
Op.69no2
Op.69no1/Op64no3
Op.34no2
Op.70no2/no3
Op.post in e major
Op.post in eflat
Op.post in e flat (sostenuto)
Op.post in a minor
(sources) I've tried a lot of the waltzes and am currently working on op 34no1