How to make Ohmwrecker an attractive seige item

Instead of merely disabling towers, what if it could actually convert enemy towers for a short time, targeting enemies instead of allies..

-________________- UNIQUE Active: Seigemaster:

**Enemy Turrets: **For X seconds (scaling with level), enemy tower is converted and will attack enemies in range instead of allies. (X = amount of time for 1/2/3 turret shots)

Allied Turrets: For X seconds increases turret attack speed by 30/40/50% -_________________-

(I'm not a numbers guys so I'll leave any balance issues to the powers that be)

I'm not sure how this would work balance-wise, but I'm thinking it can scale with level with 1 shot for early-mid game, 2 shots during the midgame, and scaling to 3 shots late game. It might be too strong, I dunno, but lord knows we need a reason to buy ohmwrecker lol

Edit: Thanks to Valkyrie Witch for the idea of defensive capability as well