Cordelia and Anya have more in common, well I guess both turning down the wrong path and back again is more in common, it is more like a bad influence on each other, Faith does not need Anya's poo pooing of accountability (they were bad men / they had it coming /they hurt me) Anya is not the type to let any thing go, and is also violent and if she got her feelings hurt might answer with a back-hand, especially since a slayer is tough enough to take it and I think Faith would have something to say about Anya's self pity.
Cordelia might appreciate chatting with a girlfriend who loves shopping like her, listening to Anya insult men, taking her advice and Anya is similarly forthright and appreciates the same, phrasing things brusquely and to the point while Cordy's wily remarks bounce off her because she doesn't care
I feel bad Lorne doesn't have any body to let loose with , always put in to these mentor type roles he can tutelage Andrew who can talk pop culture as much as he can, help him except himself, growing up doesn't mean growing old.
Oh god.... do not want to imagine the damage Lilah/Anya's night out would cause
Willow/Lilah?