WA vs Primary stat

As it is now, my Blade Master needs roughly 3 LUK to beat 1 W ATT. I have full Empress set unscrolled save for the weapon. I have a high amount of W ATT as a DB and my % LUK is high too, so my W ATT to main ratio is different from say an archer with corresponding gear . I have a feeling that a perfectly LUK scrolled overall would be a better bet for me than chaosing it (due to luck issues), but the rest of the items would be more beneficial to chaos.
If you are a cheater running around with duped high attack items, it would probably be in favour of main stat more than W ATT, but I like to asume that most people stay away from that cesspool.