https://mods.factorio.com/mod/ArmouredBiters
game version 1.1.36
rampant 1.1.1
armored biters 1.1.4

So i disabled RSO biter generation, and enabled the RSO setting "use vanilla biter generation" to allow rampant to work properly, since the rampant AI seems to get confused with non-rampant biters and nests. this makes rampant "take over" control over all biter nest generation (so far so good - working as intended)

now, the armored biters mod has 2 options:
1. have em spawn in vanilla nests (doesnt work, since rampant uses custom nests)
2. toggle dedicated armored biters nests (also doesnt work, since i assume rampant is forcing its own nests instead)

i know this isnt a sole fault of either mod, but rather an incompatibility caused through unique nest spawns and the biters from those. i am posting this on both mod portals hoping that this can somehow get solved. (allowing rampant to spawn armored nests or amored biters mod being more "dominant" in its nest spawns)

i dont exactly know how it is coded, but it seems that either one of those nest generations are taking priority and disallowing the other.

IMHO it's better to use older version (1.1.1) of Armoured Biters. I didn't update that mod after custom nests and other Rampant-conflicting things were added.

Rampant just uses the graphics from armored biters for brutal and regenerative factions, none of the logic.
If you want to use the armored biters logic disable Rampant's new enemies.