Hmm, didn't know one book counted as a horde.
She could have snuck up on one thug and knifed him dead, and then had a close fight with the second. I dont think it's that unlikely. Heinrich should know what can happen when people roll high damages. women have the same stats as men.
Thinking you are bad ass enough to kill 4 thugs on your own is not a fluke circumstance.
It's also Julian's job to get hit, seeing as that is what he is best at!