Go into a cage haven? ships get stuck in the rocks and can’t get away easily. Or other anoms like Forsaken Hub, Forsaken Rally Point where the NPC only spawn in one spot and not dispersed over 60km like in the gas haven that you used for testing.
You very likely also want to rat in space that is weak to EM and Kinetic. For instance, Battleships for Sansha (they have 45/65 on non-elites) and Blood Raider (they have 43/63 resists on non-elites) are a better choice than Serpentis (they have 66/46 resists on non-elites): EVEInfo / NPC Ships
But you know what killed your efficiency, too? That this weapon targets effing destructible structures.
Also, did you just implied admit that the old ratting is difficult to a degree with different tools?