Factorio Forums

I'm mostly looking for something that will increase how often the biters spawn to come assault my base.

I'm already playing around with:
/c game.map_settings.enemy_expansion.min_expansion_cooldown
/c game.map_settings.enemy_expansion.max_expansion_cooldown
/c game.map_settings.enemy_expansion.max_expansion_distance
/c game.map_settings.enemy_expansion.min_player_base_distance

Also the evolution factors, although I've upped it to its max anyway.

Any ideas?

You can increase biter HP, damage reduction, ...

When you have already tried most combinations of world settings the next step would be to look at the modding scene.
Maybe try RSO and Marathon?

I definitively recommend Misanthrope Mod.

viewtopic.php?f=97&t=17291&p=135080#p135080

Why? Because with Misanthrope, even if you are clearing biters nests and none are contaminated by your pollution, they will come after you, sometime over long distance, and literally smell where they should attack. Leave them alone, and they'll plant new bases in choke points also!

I would change the pollution and enemy evolution settings

You could try mods like Natural Evolution