If you are leaking constantly, check this list:
The "Worker Push" is how you scale. A common mistake is building too much defense, which leaves you with low income for the late game. Early Game Rule of Thumb legion td guide full
The King can be upgraded (maximum 1000 HP). Each upgrade costs gold but increases his attack speed. If you are leaking constantly, check this list:
Passive: Extra gold per wave. Best for: Learning fundamentals. Build example: If you are leaking constantly
Provides lifesteal and attack speed to nearby melee carries. Starcaller / Sacred Steed