The last thread was locked before I could comment, but there is a straightforward way to take advantage of Sableye's lack of vulnerability - pass boosts to it.

Cosmic Power would be ideal, but I can't think of anything that learns both that and Baton Pass. Gorebyss with BP, Amnesia and Barrier gives pretty much the same deal. Or a Baton Curse Umbreon...

In 2vs2 you probably just want to use Reflect and Light Screen though. Sableye can be hard to take out through those.

Yes, I know hazing and pseudohazing are the counter, but the previous thread got me thinking...