[Hiro_Antagonist]

Orc2 is tricky because you won't be able to buy reinforcements at any point.

One thing that will help is occupying cities whenever possible to conquer them sooner and prevent enemy income/production (though not necessarily at the cost of losing a unit.)

You start off with significant critical mass in this mission, meaning you have enough troops to overwhelm enemy forces while taking minimal damage. If I remember correctly, it helps to keep most of your forces concentrated together while taking over once city at a time with overwhelming force. And if you can move a unit onto another city to block production, even if just for a turn before retreating, that will generally improve your safety and buy you some time.

One of the most important things is to try not to lose any units. Each unit you lose has a severe impact on your critical mass, until you no longer have the edge. So if you're going to take damage, try to soak it with your wyvern riders, who have good armor and can fly over difficult terrain to escape further damage while they heal.

I honestly forget the opening I used to win on this map, but I think I sent one second-winded raider to one city (to the right?) while moving the rest of my forces south. Or maybe it was the other way around.

I hope that helps!

-Hiro_Antagonist