I was in hog heaven playing with the combat engineers. Mainly I concentrated on the UCS forces - mainly because they have the Mechs. Their main defense is tank traps. You can assign whole files for construction by drag and click. This was a vast improvement over other games that required almost full time micromanagement of building defenses.
Not only tank traps - but ditches! He he he I spent hours constructing the most Baroque entry / exits to my base where the enemy had to traverse corridors of tank traps - then into a ditch lined by defense towers.
Back to Earth 2150