I didnt know havoc = dmg to tower, i always get 160 havoc from attacking.

You can deal only 120 per attack (60 per round). How attacker got 200, explain, smart boy. After he won my tower was 80/200 for few minutes, then suddenly fall to 0. Server lag or hacks.

Amount of Havoc points = the amount of damage to the tower

If the attacker got 200 points from his attack, he deals 200 dmg to the tower.