Is there some info about enemy stats or how evolution increases their strength? Its 1:46h, evolution is 6.8 % and I am being attack by very strong acidic biters that takes few seconds to kill with regular ammo. Answer is obvious, all military research but regular bites at this evolution are a joke and I have no idea how to prepare for the future of my factory cause I dont know the enemy strength.

You can hover your mouse over the biter and see its stats.
At 6% evolution, the biter will be level 1. 15 health, 5.25+1.75 damage
This corresponds to the parameters of a standard small biter.

A different value can only be if you accidentally or intentionally increased the "World: Beginning enemy level" parameter. By default it is 1

In addition, the behavior of biters in “nocturnal mode” in Rampant Fixed is different. At the beginning of the night there is guaranteed to be a siege mode, i.e. biters, distracting the player with regular attacks, will try to quietly place nests somewhere in the polluted area.

Besides, if you are very unlucky, as night falls, the wave accumulated from pollution will not be canceled due to “it is daytime”, but will go on the attack. And there can be many of them.

Because of such nuances, gameplay in “nocturnal mode” is even more difficult. Closer to night, it’s worth checking the map to see if the biter has accumulated somewhere.

Thanks for reply. It was combination of big wave and rather a small defense.