We don't need to conquer them to make them irrelevant.
Booting the DPs and Nomads back twenty turns works just as well.
While everyone else built settlements, we were farming.
While everyone else made new people, we were farming.
While everyone else trained new soldiers, we were farming.
While everyone else developed new tactics, we were farming.
While everyone else developed more technology, we were farming.
We got very, very, very good at farming. The whole society is built on the principle of ensuring there is enough food to last for years of drought, a massive invasion, or any other crisis of such magnitude. We made ourselves self-sufficient, ensured we would be able to turtle up as to keep farming if shit went down.
Now, everyone is getting fucked, but we finally get to use our supreme green powers to ride it out in perfect form.
Don't piss away the single biggest opportunity we've had to date. Our enemies were getting so smart, so strong, so entrenched, we would not be able to remove them. We don't have the strenght to do so decisively, to not risk a massive reversal, to not risk all of the others fuckwits surrounding us to fall on our undefended home.
Look at the Dead Priests. They are building up like the damn Roman Empire, they are building a sustainable slave-based community, essentially keeping all the strenghts and none of the inherent weaknesses.
The Nomads are of sufficient size that, as they are, we can at best nible away and keep them disorganized. If they form up, they could roll over us.
Hell, HK itself isn't exactly super friendly, they simply got the DPs on their doorstep. Note how our caravans aren't any safer throught their territory than the DP's.
Both of the huge, super-militant groups expanded enough to reach our doorstep.
This comet? Is our big break.
We are surrounded by enemies. Let them die, carry on and keep farming.
We can them utterly crush them as centralized powers, if they don't die on their own. See if we can find glorious metal in the lowlands, get the best of the fertile lands under our controls, loot valuables, including DP's tech, loot horses and chariots from the nomads, the list goes on and on.
[X] Powerofmind