Yesterday i played two more tanked, and had two defeats! My rank fell to around 6000. Bad. One of them took place on Syrtis Major which i have very little experience of. Anyway, i could have done better than i did. Turtled way too much, and my opponent got all the mass-goodies. The other one was an Open Palms and my opponent were really good, spammed units continously and did not let me expand, consequently he overrun me after some 30+ minutes.
Today i tried the, more and more, popular SupCom Art of Defence, accessable through the Map Vault. Explained shortly, you try to defend against waves of AI attacks and due to the lack of resources on this map it turn out to be very challenging. Try it. Cyde Weys over at SupComTalk have beaten it, and his replay passes nine hours(!). Something to be aware of before download.