You must have been lucky that the ghost of she didnt kill you(lol).
I have yet to kill her(tried 3 times) I tried using my .50 cal and killed her but then the other 4 came and killed me.
Don't be fooled, Lucky is [censored] deadly. I gave Turbo the credit for my win because I think being able to dodge Ghost of She was much more decisive than being able to kill her quick (cause cmon, I was in bullet time. No need to kill quick), but I was using Lucky too. Lucky was my primary weapon for the entire DLC. With the special Hand Loader ammo, Cowboy and Lord Death, Lucky does like 47 base damage, + another 38 or so every time it crits. With 10 Luck, Finesse and other various crit perks, you'll crit literally every other hit, and Lucky fires quite fast.