Skaven 1500 -with Grey Seer and Plague Furnace...
I just realised you can squeeze in a large Furnace unit (the Furnace takes up 15 models I believe so it's equivalent to 50 monks) and a Grey Seer at 1500 points, without compromising on numbers - there are still 60 well-equipped clanrats and 34 slaves as well as the monks. Both the seer and the priest are reasonably well protected. The downside is there's no room for a doomwheel or HPA, but I think it's worth it to have both an incredibly deadly CC unit and a powerful wizard at such a low points game. It's also difficult to find points to protect the BSB, and the weapons teams are ratling guns to keep the points down.
What do you think? Does the list lack punch without rat ogres or an abomination and no cannon? The slaves could be replaced with a cannon but then there'd only be 3 blocks of troops which is a bit worrying. I suppose 'shields all round' could be dropped to save points but I think it's worth the 1/2 point each for the ward save.
Grey Seer - talisman of preservation, dispel scroll - 310
30 Clanrats - shields, command, ratling gun - 210
Plague priest - talisman of endurance, censer, plague furnace, tail weapon - 304
35 Plague monks - musician, standard bearer, plague banner - 290
Battle standard bearer - 70
30 clanrats - spears, shields, command, ratling gun - 225
34 slaves - shields, command - 91