Rifts.co

This modpack uses minecolonies to allow players to make cities to raise armies, using the magic and armor mods to gear up their troops to fight for rare items food or land on a small map.

 The other dimension mods allow players to rebuild or hide away in them after they lose land or to gear up to go on massive raids in different dimensions.

While some may choose to use technology to defend themselves without the need for mass armies or workers

This modpack is very much made to be played with multiple people.