Red Orc rocks indeed!
I love the tanks (but then any SH3 captain would - right?) What I do in the tanks is take them to the limit (again what any SH3 captain would do - right?). My method is simple - the enemy infantry is very slow, and so too are their tanks usually. A rapidly moving tank is a target that has the enemy in constant confusion. They plan their panzerfaust attacks, but then you are already in places they don't expect you or coming up behind them and running them over. A real tanker should practice long hours on empty maps until he knows very inch of the map and how to go almost anywhere.
This is how you know you are in the company of a real tank driver: