With my VC's, I'll usually try and drown them under a unit of sword&board skellies! S6 isn't needed to get through my armour, and I still have a token ward save against their attacks.
Throwing ASF onto the unit at least gets rid of their re-rolls too.
Spirit hosts & wraiths are excellent too since they're ethereal and thus, only a character and/or the amulet of light will worry them. Best of all, both units are skirmishers too, so even if the WL's are hiding in a forest, it's benifits aren't hurting my stuff!
As for other armies;
a) spells that inflict toughness tests or sap their strength work wonders. (shadow magic can do evil things to elves!
Skaven are ace at this, as the elves don't have alot of answers for their plague furnaces, which can inflict 2x toughness tests on them, and then add impact hits for the insult to injury...
b) core infantry. Anything cheap and numerous will murder WL's as their save is only 4+ IIRC in combat. Units like ghouls, corsairs, MoK marauders, dryads, etc... are solid choices as they also have additional attacks as well.