Maybe she could be placed after the Solomon's rule, before Israel got divided between Judah and Israel, and she could be like as you said, some Gideon or Sanson that defeated the "enemies of israel" with his magic powers, maintaining united the kingdom assasinating both descendants of solomon (there was a woman that actually did the same with a king that was enemy of the israelians, but I dont remember her name), and establishing another king or even a third successor of the "blood of David".
She could marry him or not, maybe in both cases maintaining a militaristic and totalitarian rule over the israelians, crushing their neighboor kingdoms like the moabites, the assyrians, the egyptians, etc.
In a future, maybe a simp of this prophetess would proclaim himself descendant of her and David (this is an assumption, maybe the history would even make her as spouse of david, allowing him to have even a higher "divine" rank to proclaim his claim of "mesiah") and if he is the enough good commander to raise a rebellion against the romans and win it, he would become the "god's commander" in the earth.