Emp overall or top+bottom

I've never understood why the 7-Piece Empress Set Effect is so bad. It makes the decision very easy for me to drop the overall and replace it with my almost 40ATT Homecoming Top/Bottom Combo. But then things get tricky, should I replace the cape or shoes with Nova items? I won't touch the purge-bait Tyrant items. Nova items drop regularly right? Would a Nova replacement equal the 30% Boss I'd lose? I have three capes, so availability isn't a limitation there. Then See brings up a better question, if I will only be able to get 11-50 Dojo Gloves, would it make up against 33ATT SE and eventually SI Gloves?

I think someone had a calculator that allowed comparison between items, but there are more variables here than I think that thing could handle. New calculator with Potential and Set Effect options please.