Help me, I'm an addict!

Hi all! So I read a lot of fanfiction but clearly I haven't read them all. Recently, I've been in the mood for a bad-ass Harry. By this, a competent, I-Could-Get-Creamed-In-My-Next-Fight-But-Ill-Try-My-Best Harry. I find that I like really good duelling scenes, clever wand work, some sort of story arch that makes sense, even if it's AU. With that...what's your favorite scene from a story? I'm willing to give most stories a try at the moment. I'll take any and all recommendations!