So I've been trying out the different elites across the Eldar (and others), but I'm having trouble finding one more destructive than the Autarch not counting the super walkers. My opinion is that he's broken as hell. If you haven't had the pleasure of pulling off his W->Q->W combo on an entire enemy army, you must try it. I've had games where the enemy massed 6 sniper squads and you can't approach them. So I just grab them all at once and insta gib all of them.
In case you're not aware, the W throws out the cyclones and his Q does his sky jump. When he does that, all enemy hit by the W and in between the cyclones will be pulled under him at the same time. Your "new" W in the air is a x10 plasma grenade drop. This combo insta gibs every infantry I've used it on. I've also tested casting W-Q as fast as I can, and it will still grab the unit it hits. To top it all off, he still have the sky leap landing thing when he's up in the air that works as an AoE stun after all that.
Have you guys found anything so destructive in a single Elite that's not a super walker? My Elite loadout is always the Scorps/Autarch/Wraithknight.