@ravenking: Yes you are right but the devs are aware of that problem, to fix it they will bring a universal defense army which will protect your bases (so you wont need to divide them between your cities, which would effectively diminish their power even more) and even better raid battles will be controlled by the AI for both sides, so the enemy cannot crush your defense like he did at the moment when you were offline. Of course we should see how it would work but most probably it would be a far better system for the defender player and much more manageable.
@Justin, units such as archer towers, black scorpions or dragons have huge deal of DF (defense), in order to defeat them use armor skipping units such as balista or magic casters (purple scorpion), or break their defense by using catapults, cult legions, turquoise scorpions, etc... Some special attacks can also skip DF like avon-ra's unleash the beast.
It is one of the greatest browser based mmo strategy games i have ever seen. it has a unique combat system, great TBS, great fiction illustrations musics everything. good work guys!