Math Time: Your health is 950 during swarms assuming you kill one enemy per turn you have between, roughly, 450-350 health left that's fine right?
No.
If you don't get kill first turn but continue to kill one enemy per turn you have between 200-50 health left. But you can miss, run out of energy, and your main attack is random, meaning you can't reliably kill one per turn. Also there is only one health item in the entire area so you can't have a health item for each swarm and you can't go back to the haven and find items you may have missed
Why is this so hard for the first area?! I should not require a walk-through for the first area of any combat game, especially a porn one. I want my PORN! NOT COMBAT MATH! It looks really good

(PS. If I am wrong in any of this please correct me)