Commander

Level 1: Costs 1150 to place. Does 2 damage per shot. Has decent range with slow firerate (no one cares about his dps so I will skip it). Boosts towers' firerate in range by 0.2X. (Note that it doesn't stack with other commanders)

Level 2: Costs 900 to upgrade. Increased range. Does 3 damage

Level 3: Costs 1000. Increased range. Boosts towers' firerate in range by 0.3X.

Level 4: Costs 9350. Increased range. Does 5 damage. Boosts towers' firerate in ranger by 0.4X. Gains an ability called Call to Arms. It increases all towers in its range(Including himself)'s firerate by 0.56X. Lasts for 10 seconds.

Level 5: Costs 13550. Increased range and firerate. Does 7 damage per shot. Boosts other towers' firerate by 0.5X and making towers in its range to have hidden detection. meta tower yes

(Credits to bryanw1278 for the info)