Academy Saikyou no Mob Healer: Shinigee Sekai no Mob ni Tensei Shita Ore wa, Hazure Job [Healer] to Gensaku Chishiki de Musou Suru

A famous game romance action RPG "Dungeon Academia". In that famous world of "game to the death," I reincarnated as a mob with the worst job possible: "Healer. " My fate was dying right away... However... I'll use my knowledge from grinding this game for days on end in my previous life to overturn that fate. A reincarnation fantasy, where healing is turned into a weapon to fashion a meteoric rise to the strongest in the world.

(Source: Kodansha, translated)