Empress build struggles in the current meta. First of all, your main moves second, and almost every teamcomp uses at least one form of cc (be it acu, immobile, chaos), debuffs on top of it so karin cant clear those debuffs in order for main to act. Second problem is that empress build was meta during 1.0, when there werent that many ninjas. If you look at recently released good female ninjas, you have Fuu, hokage tsunade, sailor sakura and mei. The game lacks strong females, thats why this archetype is simply outclassed by dance of impetus teams. It's still easy to obtain free team, that works really well in the early game and vs blitz teams (since you take close to no damage r1).

You could try variation that i've recently seen: sasuke playboy, mei, mabui and wind main.