Ah, i see.
Well, i didn't really start thinking about what it would take to defeat Bluenote. First things first i think we have to determine how to deal with his gravity, since it's his main tool.
We know that Natsu casually walked without being affected. But Wendy and Sherria were affected to the point where they couldn't move at all.
I don't think Lucy is massively superior to either one of them that she would be able to fight correctly under Bluenote's gravity. Her spirits are definitely not either. There's no way in my eyes that Lucy can defeat Bluenote without countering his gravity, and imo she's not powerful enough or has something in her kit to do that.
I'm repeating myself quite a lot i guess. I'll stop :P