It is arguably the most efficient weapon for mid-tier demons like Hell Knights and Revenants.
Save ammo by tricking enemies into attacking each other. If a demon is hit by a projectile from another species, they will often turn and fight each other. DOOM II
Doom II: Nightmare! 100% Secrets + Items - Part 2 (MAP17 - MAP30) It is arguably the most efficient weapon for
Grants specific power-ups: S for Berserk, V for Invulnerability, R for Radiation Suit, and I for Invisibility. Strategic Combat Tips V for Invulnerability
Avoid picking up ammo boxes if you are near maximum capacity to save them for later. For weaker enemies like Imps or Zombies, use the Chainsaw or Berserk-powered fists to preserve shells.
Instantly jump to a specific map (e.g., IDCLEV07 for Map 07).