I know it seems to be the 1 trick pony of last month but i've been kicking this idea around in my head for a while:
Avatar
Eldrad
Dire Avengers:
7 avengers
Exarch w/ 2 catapults and bladestorm
Dire Avengers:
7 avengers
Exarch w/ 2 catapults and bladestorm
Harlequin Troupe:
7 Harlies w/ Kisses
Shadowseer w/ Kiss
Harlequin Troupe:
7 Harlies w/ Kisses
Shadowseer w/ Kiss
Wraithlord:
Bright Lance, Missile Launcher, 2 Flamers
Wraithlord:
Bright Lance, Missile Launcher, 2 Flamers
Wraithlord:
Bright Lance, Missile Launcher, 2 Flamers
Basically my thoughts are the MCs form a wall for the avengers while the harlies anchor each flank. Slowly march forward and take objectives.
Feel free to nit-pick to death.