How to improve the world in troubled times?

This upgrade: 1, skill points have been reset, and the main upgrade battle can give you a lot of fighting power.

Remember to guard the city with the most powerful hero.

3. Tai Shiyuan studied the art of war more.

4. Hero level is very important. Different heroes have different weapon gains.

5. When defending, use the attack and defense bonus when the strength is almost the same.

6. When attacking, when the strength is similar, in addition to the offensive and defensive gains, we must also use the army to expand.