Homebrew
Medical Mastery. The surgeon has advantage on Medicine checks and can stabilize a creature with a touch, without the need for a Medicine check.
Cybernetic Enhancements. The surgeon's reflexes and cognition are enhanced due to cybernetic modifications, granting him an extra reaction each round.
Scalpel Strike. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 2) slashing damage.
Cybernetic Disruption Device (Recharge 5-6). The surgeon activates a device that emits a burst of disruptive energy in a 15-foot cone. Each creature in that area with cybernetic augmentations must make a DC 15 Constitution saving throw or take 10 (3d6) lightning damage and be paralyzed for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
Medical Drone Deployment (1/Day). The surgeon releases a small flying drone equipped with medical tools and drugs. The drone has an AC of 13, 10 hit points, a flying speed of 30 ft., and can take the following actions:
Heal: The drone administers medical aid to an ally, restoring 10 hit points.
Inject Tranquilizer: Ranged Weapon Attack: +4 to hit, range 20 ft., one creature. Hit: The target must succeed on a DC 14 Constitution saving throw or be poisoned for 1 minute. While poisoned in this way, the target is also unconscious.
Surgical Precision (1/round). When an enemy misses the surgeon with a melee attack, he can immediately make a Scalpel Strike against that enemy.