I am wondering how players get to Power Levels of 25 Million +, I have been repeatedly attacked by players with these power levels and I am having difficulties getting past 4 Million Power as each time they do they drain my Resources and Defences. My Supply Bunkers are maxed as well as all of the buildings in my first 4 cities, I am on my fifth city as well. I am not complaining here I just do not know how to get to Power Levels such as 25 Million. I know it would be easier if I weren't being attacked so offen. I have just used a couple of Exodus to move two of my cities so that should help for awhile. Any ideas or stratagies to get to these extremly high power levels?