Ideas for buffing towers

Outer tower, multi shot, when target becomes a champion tower will then target a number of champions based on the number of ally/ enemy champions in range

Inner tower, charged up,+1charge a min, tower deals its max dmg vs champions an consumes 1 charge, still do max vs minions no charge consume, Or Gains charges based on number of ally/enemy champions when a champion becomes target

Inhib tower, last stand, does bonus dmg based on its remaining hp, give it a higher fire rate that then goes down based on how many times its crumbled

Nexus towers, focused shot,when targeting a champion increase range of other nexus tower when both nexus towers target same champion the nexus towers will then do increased dmg