omg I'm shocked it's queen Troian

I adore her and shes really intelligent... however, feminism does not mean you cannot get revenge on a woman you consider to have back stabbed you or hurt you. That's just called getting equal or applying the "an eye for an eye" ideology which can be debated as being childish at most but it is definitely not anti feminist in it's spirit. This whole argument of "tearing another woman down" is just a shield to block women from defending themselves against one another. If a girl hurt you, hurt her back if you want to be bitter. Go for it.
p.s: I'm not necessarily talking about any one incident..i'm talking in general. If you feel like someone tried to sabotage you/back stab you/tricked you (whether that actually happened or not) then try to move on and forget..but if you absolutely cannot do that then get you're revenge no matter what that persons gender is.