Ohmwrecker Idea

So i was looking at the new Nexus Siege gamemode and i was like... DAMN. this is fun. one of my favorite parts of the game was the Offensive teams Turret that shoots from afar. it would be too op for Normals but i thought of a way to implement it...

Ohmwrecker: 3200g

Stats: Health: 300 Armor: 50 Base Health Regen: 150% Cooldown: 10% Ability Power: 50

Passive: Builds up to +20 movement speed while near turrets (Including Dead turrets)

Active: Places a long range ballista if within 2000 range of an enemy turret, after a 5 second delay, it will find the nearest enemy turret, Disabling it for 3 seconds every shot. If the targeted turret dies, so does the Ballista. (160 second cooldown after turret dies.)

Builds out of: Hextech Revolver, Raptors Cloak, and Kindlegem.

Edit:Instead of disabling for 3 seconds every 5 seconds, it should Disable it for 1 second, but shoot every 3 seconds. This would bring more time for the enemies to have a fighting chance instead of feeling useless if they cant take down the balista.