That's cute.
Im quite happy with sharing with you my own personal forumula for creating a all conquering force
First ingredient
> Goblins, good warrior race that will see their primary ambitions of ruling the world within their lifetimes come to fruition (if the demon lord is overthrown or dies)
> Change ethics on slavery to mandatory
Second ingredient
> Modify the raws extensively to make them playable in fortress mode, this includes fixing tags surrounding beak dog pets as to enable trade and some tools, anything extra like pottery you want to add is your own decision. I recommend holding them as they are now at iron as the most advanced metal they have access to.
> Modify key fortress mode nobles into the game with any mix that you desire as long as it does not involve a land-owner/mayor (Head warband practitioner - chief medical dwarf etc etc.) I personally for gobbo choice, like to roll champions and executioners together by modifying the weapon skill to use a axe and hybridizing the responsibilities (with no adverse effect in the game).
> Leave all but the diplomat & outpost envoy nobles for wider non-site nobles. These two are important for site interactions (meeting with expedition leaders who by legends often arise by threats of violence fittingly when they splinter off the tower to rule over dark pits) and wider diplomacy interactions between your leader (procedurally generated demon monarch, dont replace monarch important note, and the procedural general which organises sieges where the demon leader dictates, naturally made more powerful by site individual military presence) and the rest of the civilizations.
Final and key ingredients for this tasty dish of world domination
> Modify in a conquered site noble (using the unused dwarf equivalent as basis, so that they can actually hold onto sites for themselves rather than have to comply with raising them without taking the entire civilization first as a puppet)
> Modify all your localised militia groups & commanders to 'law enforcement' so that they enact their slavery routines and round up tresspassers when site fighting resolutions and patrols are finished. Incarcerated people will be added to the prisons and soon re-emerge as citizens to work the lands.
Run for 100 years or more
??
Profit, they effectively rule the world without burning down most of it. Humans elves and dwarves are rolled underneath the goblins thumb and a new age of peace, prosperity and utmost cruelty is complete.