I started this Eldar mirror using my regular mirror BO of Shieldlock, 2x Gu, Rangers into a Falcon and Fire Prisms. I didn't expect to see Stellvia's anti-'Nid (ironically, only good against SM unless the 'Nid is your average Warrior abusing prick) BO being used against me and, having seen how destructive buffed Shees are, pretty much shat my pants at it. Little did I know, my BO actually annihilates Stell's one in a mirror (kind of expected, in hindsight). Mistakes were made on both sides (major ones by me, losing two Gu squads and a Ranger squad... Jesus...) but the game is still fairly entertaining and educational, if not a very poor example of high-level play.
Gu, 2 gens, Rangers, gen, Champion's Robe, Merciless Witchblade, Battle Equipment, T2, Heart of Darkness, Falcon, T3, Fire Prisms (Yes, it's so linear that you can follow it to T3 xD)
Stellvia's BO (Only use this against SM)
Gu, power node, Shees, gen, Armour of Fortune, gen, Doombringer, gen, T2, Shee upgrades, adapt