I'm a Sound Forge guy myself, but I see your point. :-)
The thing is, if I can't even get a de-esser to zap the troublesome freqs I don't see how EQ is going to help. I could live with the distortion in a general sense, but it makes the singer sound like she's lisping or has a retainer, and in the context of the mix really takes the meat of the take. But I'll try the various techniques (including that sidechain trick Bit!) and see what I can do!