Basically, it's impossible. In 1.1 of factorio it was possible without much in the way of tweaking things.

I've had to remove the shrink nests/worms, attack wave enable the swarm and add safety increase for acid, etc. And even that isn't enough. The biters walk through dragons teeth as if they don't exist. The really big ones maybe a little get slowed down. Also, they tech up just so fast. Before I even have military science I'm facing T4's, this is with me adding a cheat mod to give myself bots (since there's as of yet no compatible quick start mod that works with K2).

The only thing I can do is via the cheat mod is edit the evolution down, and turn off evolution, once they out tech me, or start over as I have several times.

Not sure what can be done but I wanted to offer the feedback. I enjoy the rampant biters, and they are a lot of fun. The new 2.0 version is much better to be sure. Only I wish they didn't rank up so quickly. Obviously, it has to do with the max rank picked, and the current rank seems to be tied linearly to the evolution.

You are absolutely right. Krastorio can only handle level 6-7. Also, K2 requires more time, and evolution will overtake you. In addition, biters do everything to slow down your progress. As a result, on the deathworld, you risk losing even on default settings.
My recommendations: slow down the evolution to the standard world and set level 7. You may have set the level to 9, thinking that some factions would otherwise be unavailable. I assure you that factions only open up from the evolution level.

Maybe this will help. Availability of biter factions tiers, depending on evolution:
tier 1 = 0.1 (acid)
tier 2 = 0.17 (fast, electric, etc...)
tier 3 = 0.27 (regen, spawners, etc...)
tier 4 = 0.37 (fire, etc...)
tier 5 = 0.47
tier 6 = 0.56
tier 7 = 0.65
tier 8 = 0.74
tier 9 = 0.83
tier 10 = 0.91

Also, the first three tiers become available over time, even if the evolution is not sufficient.