I haven't read much of Gold Digger in a very long time, used to love the series but I lost track of the books, and when i got back into comics again I was pretty much a DC follower. Having read pretty much every trade I could get my hands on with Cassie in it, and knowing that Julia was her homeworlds Weapons Master of Jade, I think it was called, and I think she regained the title again a second time after completing her training in her fighting style and become a recognized master in her own right. I figured why not match up these two women who's fighting prowess are legendary and see what happens. I can't list as many feats for Julia off the top of my head as its been a long while, and shes not a central to the over all story so her adventures usually took place in flashbacks or small narrative stories of her youth, (shes been some what de-aged last I read thanks to the renewing palm technique.) so im not sure how she places in terms of ability compared to Cassie but the Gold Digger verse is definitely mid to high tier god-like magical beings, and a place where knowing the martial arts can grant you a chance of defeating things that probably would kill any normal person with little effort.
Julia in the past has been a adventurer and a pirate.
Her Father was pretty much a master martial artist himself whos claim to fame was defeating her mother with his drastically smaller frame. Speaking of her mother, her mom was a huge viking like warrior maiden, and when I saw huge I mean, like she was really, really big, this is before Julia received the renewing palm but its still a good showing of how powerful her mother was even at her much older age.
As far as the match goes, Julia is using her martial arts skills and isn't using her trademark sword fighting skills. They fight in the normal Khazan arena, no prep fighters start at about 60ft a part.