Hi guys here a pretty easy guide on how to create a super strong piglin horde.
This is prob the strongest nation in the mod (insane industry,manpower and resource)

Here was i usually do:
1)for production go only support equip and artillery (i go for 15 mil on both of them) we do this because we have an op focus tree that gives us 100k guns so we don't need to produce them.

2)Build a ten level port in a zone you prefer (super important sometimes my division would die of attrition without this) then go full infrastracture where you have 15 iron so you can ger more.

3)rush the focus tree and go left path (you can even go right but i prefer left because it will spawn 10 full equiped division so you get them and delete them for equipment)

4)with the exp you get from focus tree and training go for a classic 20wt division (7 inf 2 art. for support i go enginer,reecon and artillery)

5) with the political power go 1)war economy then 2) limited export (Super imporant) 3) i usually go for civial guy for building infra faster then save 150 pp for the nether war and when it start take closed economy.Then with pp you can do what you want

6)before taking the focus to start the war delete all your division. Then go for it. the war will start and 40 division will spawn in the nether portals ( usually 8-8-8-16 for portal) stop the game and change this 40 division to your good 20wt division (these 40 are scout division that suck hard) it will take a few days for these division to get the equip but when they do you will rekt the empire.

7)You could attack or wait for the division to get the equip. Usually what i do is to try to create a single front so use your division to attack and link the portals if you do so you will get a single front.

8) now It's up to you the war should be easy and you will rekt the empire. after it there isn't a single enemy that can face you.(remember to not spam to many division or the supply will kill you.)

I usually play with the submod for the rose empire. it fix a few problem like research, i advise it.