by allstar64
The unit called the Super Mutant is the one with the no toughness and an attack of 2 in 1 direction. Borgo SHOULD have 2 of these units.The unit called the Brawler is the one with the toughness, armor, 3 directions of attack 1 being strength 2. You SHOULD have 1 of these.
In earlier versions you were given 2 Brawlers and 1 Super Mutant and obviously the Brawler is much stronger than the Super Mutant.
Without seeing a full game of yours its hard to judge how you are doing. Basically you should not be expecting to blow Borgo out of the water. Instead you should be expecting to get a hit or 2 on them but for the most part pouring all your resources into not allowing them to hit your HQ and killing off their units which forces them to waste turns rebuilding their defense.
As for calling battles you can do it from time to time if it is a great opportunity (kill off their assassins/ net fighters without causing a giant hole to appear in your defense) but for the most part you want to wait em out and force them to call the battle which if you have the lead or haven't drawn the air raid yet you can do.