It just occurred to me that Vriska was in perfect condition to fight. Everyone else had MASSIVE battles with serious strain and they all basically died at least once, but Vriska just got pestered by Hussie. She was basically in her prime while everyone else would have just wanted to take a nap by that point

Pretty much!

It’s also worth saying that a serious fight could have gone very differently, but the narrative really demanded funny over serious at this particular time.