this would mean:
0-12 Goblins ( 40 k )
0-4 Skaven linemen ( 50 k )
Allies: Goblin, Skaven
Big Guys: Rat Ogre, Troll.
Re-Roll ( 80k

The ally list in this case doesn't allow you to get to the stage where you can get two skaven positional players, so i suggest for this team due to the lack of available allies they get to choose two positional players from the Skaven list as there are no other options outside of goblin on the team list.
So you could come up with
4 Skaven linemen ( 200 k )
1 Skaven Storm Vermin ( 90 k )
1 Skaven Gutter Runner ( 80 k )
1 Rat Ogre ( 130 k )
1 Troll ( 100 k, can t remember if 100 0r 110 )
4 Goblins ( 160 k )
2 Re-Roll ( 160 K )
FF 8
Should make for a few interesting games. The starting roster is maxed out on Skaven, and if i remember correctly there were more goblins than skaven so maybe that should also be part of the final roster. ( IE Must have at least 1 more Goblin player than Skaven in team, If thats the case i'd have to drop a couple of skaven linemen for Goblins, have an apothecary and reduce FF to get to 1000k