so find a way to turn them on each others?

Single faction; Chaos obviously. Any sized army? Dwarves. Give me 300 000 ironbreakers and I will exterminate the ratties.

i don't know man they will find a way to come back, we need a plan.

Factions that could defeat the Skaven:
Chaos: Basically endless resources, extremely varied roster (I think you can squeeze some demons into pretty tight tunnels)
Greenskins: Mainly Gobbos. Adept tunnelers, numerous, potion brewers, magical. Basically all that skaven can offer, but green and maybe less industrious.
Undead, as you mentioned: Tireless, resilient


Above-ground factions have no chance to begin with, so basically all humans and pointy ears can sod right off, no matter how magical they are.
Beastmen, I just find them unlikely. They are too big and bulky for tunnels.
Dwarfs: A possible candidate, but they are locked in tradition and on the decline. They would be unwilling to sally out and attack Skavenkind.

This was a look at the big picture.



If you are talking about a smaller fellowship then I'd put several dwarfs into the group. Their knowledge of tunneling and mining is invalueable. They can dig, flood tunnels, read clues underground like none other.
A large group of goblins: Seriously, just cannonfodder and to figuratively flood tunnels to the brim.
Wizards and Spellsingers to supply a variety of magic schools, as the dawi are not magical and the goblins are not reliable enough to not spontanously explode.
Several necromancers, to use the Skaven's reliance on Slaves against them. They throw chittering hordes at you? You throw them right back, after you took them apart.
To deal with the heavies, that skaven can bring to the table, I'd again choose Orcs, this time Bigg'uns, quite possibly black orcs. They'd thrive in a fight against rat ogres, would happily charge into the monstrous creations of clan moulder, just after trying to literally strangle a Stormvermin with their own tail.

Not included are monstrous units, machinery and long range weapons as it is a mostly underground focus at the moment. Of course there would be some use to these in certain situations, but counting up some equipment for specific times would be too time consuming and I'll just skip this part with a "Take a bit of everything, just in case."

Overall it would be a sizeable regiment of specialists rather than a real army, likely to smoke out one Skaven lair after the other.

I'm well aware that this constellation would simply exlpode into a big pile of red and green giblets, rather than actually bother the Skaven.

...Who is "sneek" meant to be?

Only chance humans/elves have, is to feed them false information and attempt to cause them to tear each other apart. The Skaven "diplomacy" is a fickle thing.
Goblins could bring a hella hurt on them, the regular clan rats that is. Anything bigger, like a rat ogre/gunner/stormvermin and they'd be too scared to move. Back them up with some black orcs and you'd be sorted.
Issue is, there is no reason at all for the greenskins to go after the Skaven. But, they'd have the best chance IMO. Fearless troops like Black Orcs to deal with whatever "big" units the Skaven have. Goblins to counter the swarm of numbers with their own numbers (also, goblin fanatics with their ball+chain could smash through the Skaven ranks)
Dwarves would have the "best" chance against them with their knowledge of tunneling, mining etc, but that'd involve doing something out of the dawi way, which isn't happening. A mass of Iron Breakers at the front, Iron Drakes at the side, and Gyro copters raining bombs from above and toss in a few slayers amongst those heavy armored Iron Breakers, would devistate the Skavens with minimal loss for the Dawi, but... Dawi aren't venturing out of their holes....
Humans would just get munted because their real strength is in cavalry / machines, which aren't so great in tunnels.
Elves, wouldn't dirty their hands on rats. Theyre probably too snooty to acknowledge past a fairy tale, they also don't have numbers for it and somewhat rely on trees n ♥♥♥♥.

Originally posted by Ashera:

Issue is, there is no reason at all for the greenskins to go after the Skaven.

grimgor nearly destroyed clan moulder because it was his idea of fun. if your argument for why the greenskins don't do something is "why would they fight?" you don't know the setting half as well as you'd like.

the skaven continue to exist because the fans like 'em.

Originally posted by Jakal bringing that 2018 luck!:

Originally posted by Ashera:

Issue is, there is no reason at all for the greenskins to go after the Skaven.

grimgor nearly destroyed clan moulder because it was his idea of fun. if your argument for why the greenskins don't do something is "why would they fight?" you don't know the setting half as well as you'd like.

the skaven continue to exist because the fans like 'em.

I'm aware Grimgor has done-so for "fun". And that is really the only reason they would go after the Skaven. He did however, become bored and left. Due to this, I don't see any reason for him to return, and if he or other greenskins did... I don't see them destroying the Skaven due to the thinner their ranks get, the less fun and less chance of the greenskins sticking around to finish the job.

I am one of those fans of the Skaven. They are the most interesting faction in Warhammer imo.

Peace time is the greenskin equivalent of unemployment. :P

Grennskins if they wanted, Grimgor singelhandedly took out all clan moulders pets and anllmouts found skavenbligt, if he had done that, he had burned it to the ground himself

Heh, Grimgor also tried to sneak up on an unnatural storm created by Kislev and made a dwarf stronghold of slayers say "yeah this is too much, we're not getting into that."

I think it's safe to say Grimgor's sheer demi-god brute force stupidity was the exception rather than the rule when it comes to orks.