There always seems to be someone moaning about wysiwyg, or being incredibly lame about rule interpretations.
Or complaining about that guy who wrote some of the army books.
Or, worst of all, putting their win/loss record in their forum signature.
You mean people don't do these things on Fantasy forums? Err, you might want to take a look around some of the other boards here a bit more often
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For normal games of 40k, I'm thinking 3 Wraithlords. Any thoughts, other than "Don't play Dark Eldar" ?
Each will have a Eldar Missile Launcher and a Wraithsword, because I like the sword.
What else are you taking?
If you really want to take the Wraithsword, I recommend taking dual Flamers and possibly a Shuriken Cannon on each Wraithlord. In this way, they can run forward to set up assaults on vehicles, and tie up infantry, where appropriate. You will need to prevent Wraithsight issues somehow though, so building some kind of infantry block to go with them is advised.
If you like Wraith lists, you could take a scoring unit of Wraithguard led by a Spiritseer, but it's expensive, and rather slow, so you would have to think about adding mobile options to the rest of the list to compensate for this.
The only way Wraithlords work in a ranged anti-tank role in my experience is to give at least two of them an EML and Brightlance. Anything less simply isn't effective enough against AV12 (their primary target), or AV13 for that matter.