SO, who would be the best killer pair, since there'll probably be multiple killers like Seasons 1 and 2? Here's my opinion:

First off, Grace Gardner, she has the perfect motive, though she is too obvious, but what the heck? She was driven insane by the combination of the Wallace University murders and heavy abuse from Chanel. She also would have an easier time killing Chanel, than the other killers. She can fight, so she would be able to hold her own against quite a few of her victims, like she was able to do against Hester as the Red Devil, though she did K.O'd in the end, but she probably got better, right? She is also very intelligent, because she gave Hester a tough time framing the Chanels, but then she got outmarted in the end, but she probably improved, am I right? sS she would be able to set a perfect trap for Chanel if not directly kill her.

Second off, Libby "Chanel #5" Putney, she has a good motive. Chanel always abused her, and when she admitted that her vagina actually does have teeth, she'll probably never hear the end of it when she sees Chanel again. She has a lot of brains as well, like Grace. She managed to almost get a perfect score on the MCATS, without help, while Chanel and Sadie cheated, and she still bested them. She also beat up Douchebags #1 and #2 in "Warts and All", and kicked a drunk Truck Driver in the testicles and would probably do just as well against her murder victims.

Who do you think should be the killers in Season 3?