I watched something a while ago about how enemy spawns work. Basically, if you spread out you can create much more spawns (it spawns more enemies based on the number of groupings of players, although where they spawn I think choose which group randomly so one group could get fucked by RNG). Also, destroying nests/spawns, ironically, increased the number of enemies IIRC.

This was months ago though and I haven't played since. This might all have changed, but I doubt it.