My suggestion is to go heavy on T1 and T2. Once you get a halftrack, be very aggressive at cutting off your opponent's fuel. Do not tech T3 or T4, and go straight for either Elefant or Tiger (I would suggest Elefant on maps with long, open sight-lines). Tech however you want after that. You might even want to use a reconnaissance flight over your the enemy base at about 10 minutes just to make sure your opponent hasn't gone T3 to get a fast T70.
EDIT: as someone else pointed out, rightly, getting to the CPs necessary to unlock the big, big tanks can be hard and you might end up getting barraged into the stone age by Katyushas before you can get one. If that happens
![:unsure: :unsure:](/images/Smileys/unsure.gif)
Also, to various people leaving comments about how such-and-such unit is broken/OP: this is the strategies forum. Please put those comments in the balance forum, and let's use this forum to try to figure out how best to play the game as it is at the moment, rather than how we would like it to be in the future.