At the end of the Holy Griffin Empire campaign I had 2 special units at level 5, one at 4, one at 3, and one at 2, as well as all basic units at level 5. Then I went to the Sword Master buying station (far right area, upper right corner, behind Sir Randy in a statue) to level up, enemies attack as you walk around. The enemies are around level 8, but net 450 exp and about 1000 gold.
Also where you have to dodge guards in the alleys at the beginning of the game, below the inn. If you go back the guards are level 5-6 and net you about 280-315 exp, and are much easier and quicker to defeat. It takes me about 2-4 minutes each time. Here is the setup I found most effective:
- Basic Units: All spearmen (once all basic units are at level 5)
- Artifact: Golden Spear
- Elite/Champion Units: whatever you need to level up
Basically build as many spearmen as you can first turn, second and third turn focus on fusing spearmen formations. There usually isn’t a fourth turn, but rinse and repeat if necessary.
I like the second method better (thanks for the suggestion Mow), but some people might prefer the first method