Valkyrie wrote:They seem fine as they are. There's nothing stopping you taking an allied detachment to counter their allies.
I guess you haven't run into stupid combos yet. And game balance isn't really the point. Fluff is.
Eldrad and 5 rangers showing up in every dark eldar army doesn't make much sense. I could see a farseer being sent out, but not Eldrar repeatedly.
The storm lord a cryptek and 10 warriors showing up all over the place; why? Because the rules for him are awesome.
Fluff wise, it makes more sense for the unique units to only be found in the unique armies.
-Matt