in my opinion one of the most important things to learn is how to rotate around the enemy army in order to get one enemy to be one tile closer to you than the rest of their army, then having that one enemy engage you, and quickly killing him before the rest of the enemy army can catch up.
i gave a short guide in this >>578118
sequence of posts but it didn't seem to interest anyone so i didn't elaborate. here's a rough description of what happens:
in round 1 i wait, the enemy then moves closer, according to the default formation my army is in at the start of the battle. after the enemy moves in, i rotate in one direction. when i end the round, my army looks like in the second picture.
in round 2 the enemy will move nearer according to the shape my formation is in at the end of round 1. because the enemy wants their battle lines to be parallel to my own, it ends up taking the shape that it has in the third picture.
but then after the enemy changed their formation, i rotate my formation again so it returns to the shape it had at the start, plus or minus whatever changes you need to make based on circumstances. so at the end of round 2 when i'm done moving, the situation looks like the third picture.
look how there is one conscript that's closer to my army than every other unit on the enemy side. there are two tiles away from it and my front line, and it's using a 4ap weapon, so it will want to move in and attack twice. it will behave aggressively because the enemy has a stronger army overall than my own. the other enemy units will not be able to move two tiles and attack, so they will either spend all their movement points to lock me in zone of control, or they will behave more conservatively. because my army is not too weak for them to just ignore all my burst damage, they behave more conservatively. it also helps that this scenario gave me a 40 melee defense shield tank that the ai find repellent.
so conscript overcommits i kill him and keep kiting.