Intro Game vs. Warriors of Chaos

We are going to do an intro game of Warhammer Fantasy during the Thursday night hobby session, a first for the group.  Seth will be pitting his Warriors of Chaos against my Skaven in a 1000 point game.  Seth basically has a WoC battalion + a mounted lord that he's running as an exalted hero, and I am lending him a chaos sorcerer.  The battalion is basically 12 chaos warriors, 10 warhounds, 20 marauders and 5 chaos knights.  I am considering the following list:


1000 Pts - Skaven Roster

Grey Seer (1#, 240 pts)
   1 Grey Seer @ 240 pts (General; Hand Weapon)

Warlock Engineer (1#, 93 pts)
   1 Warlock Engineer @ 93 pts (Level 1 Wizard; Hand Weapon)
      1 Warplock Pistol
      1 Warp-Energy Condenser

Clanrats (77#, 475 pts)
   24 Clanrats @ 210 pts (Musician Mus; Standard Bearer Std; Hand Weapon; Spear; Light Armour; Shield)
      1 Clawleader (Hand Weapon; Spear; Light Armour; Shield)
      1 Poisoned Wind Mortar Weapon Team (Poisoned Wind Mortar; Hand Weapon; Heavy Armour)
   24 Clanrats @ 133 pts (Musician Mus; Standard Bearer Std; Hand Weapon; Light Armour; Shield)
      1 Clawleader (Hand Weapon; Light Armour; Shield)
   24 Clanrats @ 133 pts (Musician Mus; Standard Bearer Std; Hand Weapon; Light Armour; Shield)
      1 Clawleader (Hand Weapon; Light Armour; Shield)

Warp-Lightning Cannon (1#, 90 pts)
   1 Warp-Lightning Cannon @ 90 pts
      1 Engineer & Crew

Warplock Jezzails (5#, 100 pts)
   5 Warplock Jezzails @ 100 pts (Hand Weapon; Warplock Jezzail)

Total Roster Cost: 998

I don't have a lot of experience with WoC.  Is this list going to roll him badly?  With so few models I am afraid the war machines will decimate him, something I don't want to do in a starter game.  I also know that those warrior and knight blocks will eat clanrats like The King of Town at a chinese buffet.  Any thoughts, readers?  Is there balance, or would you play something different?  Drop the cannon or the engineer and play some slaves perhaps?