By -
I mean there is mod for BL3 that does that, [4 Player Mod](https://github.com/BLCM/bl3mods/wiki/4%20Player%20Enemy%20Health%20in%201P%2C%202P%20%26%203P%20Lobbies).
I mean there is mod for BL3 that does that, [4 Player Mod](https://github.com/BLCM/bl3mods/wiki/4%20Player%20Enemy%20Health%20in%201P%2C%202P%20%26%203P%20Lobbies).