Is there any chance of compatibility with ERM? Rampant fractions almost completely displace Protoss/Zerg. If possible, we would like an equivalent spawn. Thank you.

Try to limit Rampant's bites with settings:
World: Allow other enemies, new factions only from the specified side
World: settle the factions on the selected side
(will only work in a new game)
Together with the ERM settings, this should give the desired location of the biters of both mods.

I will look at the next release, why the ERM nests were replaced at all - as far as I remember, they are not the "enemy" force, and should not be replaced

Thanks.
I experimented a bit with the frequency and size of the enemy bases, and now ERM servers are appearing. But you need to adjust the level of health to match Rampant/ERM.

The default max level is lower than the standard Rampant, but you can set it to the same value as the original mod (= 7). But I wouldn't recommend it. These biters are smarter and faster and can be a bit difficult to deal with.