I think it could depend how the IG player sets up. Does he spread his tanks around? Does he group them centrally? Does he leave the Wyverns out the back all on their lonesome?
I guess some deep striking Taloi (Dark Artisan Formation?) could do damage, but they'd be most effective if he clumps his tanks up, so that they can get in close with a WWP and can't be targeted by templates.
Does he use Leman Russ Eradicators?
"Whereas the duty of the Imperial Commander is either to seize or defend territory, the Dark Eldar make war only to steal. If, as a by-product of this, the are able to indulge their vile passion for murder, torture and other decadent acts, then they will joyfully do so, but this is not their primary goal"