The Caravan
This is the simplest scenario of the entire campaign, you just need to walk across the map and get to your Temple. It’s the route you take that’ll make the difference. Ignore the well-marked path and instead, follow this one.
First, head Northeast to where there are Lions guarding the shallows. Kill the Lions, but don’t attack the Brown Villagers that wander by. Cross the shallows and stay to the East, down the slope and around the corner. If you’re careful, you can sneak outside the Brown town and across the shallows, dropping South after you’ve cleared them but before you get to the Orange units.
If you find avoiding the Brown units impossible, gang up on the Academy units from the cliffs. You can take out several with your Bowmen before enemy Archers attack. Keep concentrating fire from the heights and you’ll eventually take them down. Pass below the cliffs and cross the map just about the center, you’ll find no more resistance from there on. Get to the Temple and claim victory.