Had a first bash at assembling the Skaven today, there is quite a lot of bodies...
65 Clanrats with Spears
50 Clanrats with Handweapon and Shield
2 x 60 Skavenslaves
30 Stormvermin
50 Plague Monks
40 Giant Rats
6 Rat Ogres
33 Gutter Runners (or Night Runners I guess)
10 Plague Censer Bearers
5 Poison Wind Globadiers
3 Warp Fire Throwers
2 Jezzails
Ratling Gun
Warp Mortar
Screaming Bell
Seems to be a good basis for a force...