I know i sent out mail about this but gonna post it again here.
To get great dragon armor you must attack a lvl 5 or up ant farm. The drop chance is not set so there is no telling when you will get one. Just keep trying.
What the armor does is makes it so you can have a great dragon which plays a key point in expansion.
Once you get a great dragon when you want to start another base you will need to find a egg off the 4 elements, water, earth, wind, fire. They can be found in lvl 7 and up in their respected wilds. to get the second fort you will need the water egg. dont know what order after that. but each type of dragon has its own great armor which can be found in lvl 10 wilds of their type. i'm not 100% sure on the armor part just yet.
If i get any new, news i will be sure to update this or if you figure out something please post a reply correcting or adjusting any of this. TY