It’s all in the title
I used a static plex in Hjoramold before tags to quickly raise my sec staus after hulk ganks. The 2 ships that needed to be destroyed respawned every 15mins. -2 to 0 in about an hour…may differ case to case.
It may, the one I’ve been grinding recently looks like it might have a limited number of bigger rats that resets each down time, the smaller ones keep spawning but the larger ones seem to stop re-spawning an hour or two after 5pm GMT.
The DED rated plexes drop the sweetest candy, but you probably know this.
Since blood raiders drop corpum stuff I recommend that. Aridia was a great low sec region. Get a lucky drop or 2 and walk away with a billion isk easy.
Crimson hand depot FTW
Or another theory.
Are some rat spawns in some sites tied to destroy-able structures.
So when you blow those structures up those rats stop spawning until the structure re-spawns?