So, lets armchair general on this Great War: These are the available numbers
Magna Saecularibus Alliance:132,791 CS/49938 gold
Niselur-20,528 CS/9701 gold
Phantaria-12,124 CS/2460 gold
Asylon-22,128 CS/9707 gold
Libero Empire-17,160 CS/4504 gold
Farronite Republic-19,149 CS/5820 gold
Luria Nova-41,702 CS/17746 gold
Bloodstar Alliance 145616 CS/49988 gold
Astrum-56,313 CS/15480 gold
Morek Empire-42,968 CS/15385 gold
D'Hara-23,757 CS/9385 gold
Corsanctum-15,980 CS/7956 gold
Terran-6,598 CS/1782 gold
Neutrals 79935 CS/21994 gold
Swordfell-7,415/5291 gold
Barca-14,260/4908 gold
Aurvandil-27,068/5323 gold
Grand Duchy of Fissoa-25,092/6472 gold
So if we look at what capitals are nearest each other, we can group together potential conflicts:
Luria Stage
Luria-D'Hara-Swordfell-Fissoa-Aurvandil
Libero Stage
Libero-Morek-Astrum-Corsanctum-Nisular
Nisular Stage
Nisular-Astrum-Farronite-Asylon
Phantaria Stage
Phantaria-Terran-Asylon-Farronite-D'Hara-Barca-Aurvandil