This battle reminded me a lot of a recent battle against the Emperors favored banana boys. A small elite force of grey knights, all topped with 2+ save and plenty of wounds ambush the fragile and dying Aeldari. Through the far sight visions of the Farseer, the Aeldari manage to seize the initiative and strike first. The objective is to take the enemy objective and hold the own objective...!
The Ynnari war host move forward, knocking down the dreadnought to 1 wound. The grey knights deepstrike most of the army, as well as teleporting the rear deployed assault squad forward. The result is a brutal assault that destroys the wave serpent and consolidate the grey knight positions.
The Ynnari fight back, killing the dreadnought and damaging the (horribly ugly) dreadknight. The wyches reach the grey knight paladins in assault but fail to kill any. In return grey knight charge the guardians killing them, while softening up the rest of the Aeldari infantry.
The Ynnari destroy the dreadknight (This alone should be considered a major victory for Aeldari and Mankind alike. Sadly there is more of these horrible abominations out there so the Xenos will continue to wage war against mankind for sure.). The grey knight assault squad is reduced in shooting, but a lone wych, unable to escape from close combat, prevents the Ynnari from killing the palladins with ranged fire. In the following grey knight turn, the paladins are reinforced by another group of paladins, raining destruction on the dark reapers.
The Ynnari kill the new coming paladin squad with combined fire, while the second, now free paladin squad, escort the apothecary close enough to... kill Yvraine with a thunder hammer.
After a continuous standoff between the lascannon armed Razorback and the Nightwings, the Nightwings finally pulls off as winners. This relieve the grey knights of any chance winning the game with no units to hold the objective. The apothecary however... manage to charge the Farseer... and kills him with his thunder hammer.
Minor Aeldari victory.