Let's take a look at some Dark Eldar from the internet and see what other painters have come up with. I put 'white dark eldar' in a google image search and picked out a few interesting ones. I'll be judging the color choices more so than the painting skills here.
Check out Bushido's Dark Eldar on Dakka.
Next example is one from _Kettu on Warseer.
I think the idea of battle damage on Dark Eldar is pretty fitting. These aren't your pure Craftworld Eldar are they? And battle damage goes so well on whites because you can see them. It's tough to carry this through an entire army.
I think mine might benefit from some battle damage and it helps cover up mistakes. But it might make the models too busy and cluttered. They already have a lot of visual detail due to the color modulation and other details.
I'll have to put together a step by step showing you all the process for painting the white. I've had a couple requests, but I think showing it might be better.