Editing Warhammer 40,000/9th Edition Tactics/Eldar (section)

===Allies===
The Aeldari are one of two umbrella xenos factions (the other being Tyranids) that have any access to allied forces, [[Drukhari]], [[Harlequins]] and the [[Ynnari]] in your case (and Corsairs, but they're practically squatted at this point). This grants you a fairly substantial range to supplement your forces and help compensate for any particular weaknesses you may find in your Craftworld list.

*'''Drukhari''': My god can this faction combination create some fast games. Take a Farseer on Skyrunner, some Vypers and some mandatory Dire Avengers for a patrol detachment, bring 2 other Drukhari Patrols (which they get for free CP) of reavers, wyches in raiders each with a Succubus and go to town. The reaver jetbikes are superior to yours with the ability to take special weapons and hit harder in combat, plus their combat drugs and power from pain means they can last longer too. This army works because you will charge your opponent turn 1. You will tag down their tanks with squads of bikes, you will smite and executioner their units to death, and you will laugh as you zip around the board to any place you need to be. The Vypers are important for anti- tank but you can also bring a Crimson Hunter AND a Razorwing jetfighter for total aerial domination. Having great fun playing this army. 

*'''Harlequins''': You can take a Patrol detachment of these guys for any Battalion or larger of Asuryani you field at no penalty what-so-ever. If you want to focus on the Asuryani gunline units like Dark Reapers or Fire Prisms, you can take a few Harlequin Troupes to serve as your extremely killy front-line assaulters. Alternatively, double down on your lethality and support them with Howling Banshees and Striking Scorpions to slice apart melee-deficient factions like the Necrons or T'au.

*'''Ynnari''': If you have dreams of a truly united Eldar force, the Ynnari will be your best friend. As one of the few (if not the only) faction in the game that lets you mix and match units from different armies in the same detachment (with ''minor'' restrictions and/or caveats), you really can cherry pick the best units for the job you have in mind.