In Battle, Victory. In Peace, Vigilance. In Death, Sacrifice
Faction Shoot This (Weakness) Tank This (Damage They Deal) Angel Cartel Explosive (then Kinetic) Explosive / Kinetic Blood Raiders EM (then Thermal) EM / Thermal Guristas Pirates Kinetic (then Thermal) Kinetic / Thermal Sansha's Nation EM (then Thermal) EM / Thermal Serpentis Kinetic (then Thermal) Thermal / Kinetic Rogue Drones EM (or Thermal) All (mostly Explosive/Kinetic)
Triglavian Collective: Use Explosive or Thermal damage. They deal a heavy mix of Thermal and Explosive damage.
Sleepers (Wormholes): They have omni-resistances (flat across all types), so use your highest raw DPS ammo. They also deal omni-damage, meaning you need a balanced tank.