I would be taking the Orks of Waaagh Gruzzkup, Son and Heir had his Biel Tan Eldar, the Gaming Heir wanted to use his new Land Raider Crusader, which I have neglectfully failed to finish assembling and painting for him, and our host had his Imperial Guard. We all had around 750 points. Ish.
Steve had got out his very nice Cityfight terrain and we used the Eldar Spirit Stone objective counters. It seemed only right and proper to have the two imperial forces allied together to face the Xenos misalliance over the ruins of Stefangrad.
You can read the Imperial version of events here.