This is my first try at home-brewing feats and I wanted to get some advice from the community.
The idea is to make a feat that is flavored for a combat medic. Something that can improve potential damage and give the PC an alternative healing options, as well.
Your study of medicine and biology on the battlefield allows you to better heal your allies, and know exactly where to hurt your enemies, gaining the following benefits:
Increase your Strength or Wisdom score by 1, to a maximum of 20.
When you use a healer’s kit to stabilize a dying creature, that creature also regains 1 hit point, plus additional hit points equal to the creature’s maximum number of hit dice. The creature can’t regain hit points from this feat again until it finishes a short or long rest.
Due to your study of the body, your weapon attacks against beasts and humanoids score a critical hit on a 19 or 20, provided you have advantage on the attack.
Is this a balanced feat? If not, how can I make it so?