1. Leave archers exposed or protect them with peasants, an older upgrade of griffins, knights, or angels.

2. Attack with the new upgrade of peasants against creatures of level 2-3.
Attack with the old upgrade of peasants against creatures of level 2-3, without soldier's luck.

3. Attack with the old upgrade of swordsmen.

4. Attack with the new upgrade of swordsmen against creatures of level 4-5.

7. If you have light magic, don't cast mass spells; only use resurrection and antimagic.

8. If your opponent is a demon, get the new upgrade for archers.

These training halls are very expensive to build.