4 PCs.
Treat Injury, learn it, have it, love it. On more than 1 PC, too, because your medic has an annoying tendancy to stop bullets. Don't know why, but it's true.
Basically, the big damage dice on guns, low armor, and lack of healing magic intoduces extra randomness to combat. As it notes in the 3e DMG, extra randomness tends to be worse for PCs than for NPCs, because the PCs are exposed to it in every scene, while the NPCs usually only show up once or twice.
Treat Injury, learn it, have it, love it. On more than 1 PC, too, because your medic has an annoying tendancy to stop bullets. Don't know why, but it's true.
Basically, the big damage dice on guns, low armor, and lack of healing magic intoduces extra randomness to combat. As it notes in the 3e DMG, extra randomness tends to be worse for PCs than for NPCs, because the PCs are exposed to it in every scene, while the NPCs usually only show up once or twice.