I had some free time and thought I'd work out just how much of the Far East each realm covers, in square miles. Here's the list:
Arcaea: 83435 square miles (22.42%)
Cathay: 60276 square miles (16.20%)
Coralynth: 28672 square miles (7.70%)
Greater Aenilia: 43223 square miles (11.62%)
Kindara: 55809 square miles (15.00%)
Ohnar West: 34625 square miles (9.30%)
Principality of Zonasa: 41370 square miles (11.12%)
Sorraine: 24714 square miles (6.64%)
Total: 372124 square miles