I'm pretty convinced about the change, it has become necessary to do so, especially for bigger guilds to be able to defend it and build up some economy. However, I'm not questioning the change itself, by experience, it takes too long to break the Emperium, even there is barely any guild defending it.
What I am suggesting is to reduce the Emperium's HP slightly. I see enough potential to defend the Emperium with 764989098 HP ~ 860612735,25 HP(from 1147483647 / one billion, one hundred forty-seven million, four hundred eighty-three thousand, six hundred forty-seven).
So, the idea behind this is to reduce the Emperium's HP by 25% - 33,3%. However, this has to be tested further. I'd start with reducing it by 25%. Note that it remains with 860612735.25 HP, which is basically more than the original's HP by quite a lot.
If you have anything to criticize, please do so, but remember, this is my opinion. Furthermore, I'd appreciate if you stay on topic. If you think the percentages are irrational, suggest another. If you do not agree, then please give us a reason and elaborate on it.
Thanks for reading.