The Doctor Is In

Overview

 * Killing an enemy will heal you for 10 HP and allies within 1 grid squares for 5 HP.
 * Unlocked at Rank 41 for players, who have The Last Stand DLC.

Notes & tactics

 * It is a potentially good pick when there are one or more Haigen players and when the coop group is engaged tightly in kiting.
 * The perk is somewhat dual-sided and it's hard to say if it shines more in Single Player or in coop, since in multiplayer enemies will also be killed by the partners, the chances of this being bigger if players are more, although for just 2 players it might show some more effect. Additionally, the bigger health of enemies in coop makes for an increased likelihood of towers killing the lumes instead of the perk holder.
 * This perk finds use mainly in the non-survival modes (Campaign & Easy mode), since in Survival it tends to lose its impact over time, due to the increasing health pools of the enemies and therefore harder dealing with enemies via weapons.