I would bring:
Seer, foot
power scroll, 4+ ward
Warlord, warlitter
halberd, warpstone armor
Plague Priest, foot
scroll
Warlock, foot
doomrocket, warp-energy condenser
2x 30 Clanrats, FC w/ Warpfire thrower
1x 26 Clanrats, FC [warlord here]
50 skavenslaves
2x 20 Giant Rats, 4 packmasters
7x Gutter Runners w/ Slings
30x Plague Monks, FC
1x Hellpit
2x Warp-lightning cannons.
With the points left over you could put the Ironcurse back on the plague priest. I would be much more scared of this list as 1x Abom, 2x cannon is a scary staredown.