We have none. Thanks for reading folks!
Seriously though, it makes perfect sense that an army of Eldar that hunt Eldar and hate psykers would lack almost any response to psykers.
We actually have two avenues to tackle psykers. One wargear item and one HQ.
First, we have Lady Malys. She makes any unit she is a part of immune to psychic abilities. This has rather limited applications in game, but it is...something.
Second, we have the Crucible of Malediction. It's limited to Haemonculae and you may only have one per army. What does it do you ask?
Once per game, during the shooting phase, a Haemy may opt to use this in place of his normal shooting attacks. Every psyker within 3d6 must pass a leadership test or be removed from play with no saves.
Big deal right? Most Psykers are LD 8-10. Here's my thought. I may be pulling this directly out of my ass, but...Grey Knights.
They're ALL psykers. Even their vehicles. Imagine forcing everything within 18" to roll individual tests. I haven't tried this on an opponent yet as it seems rather beardy, but I'd appreciate any thoughts.
Am I being stupid or is there something to this? We desperately need something because the latest FAQ made it a lot easier for GKs to insta-kill us.(like they needed help)