User blog comment:Ziver7/My Heimerdinger Rework/@comment-26567405-20120712134523/@comment-4680018-20120713001013

The point of this rework was to weaken his early game and strengthen his late game. These turrets have a more HP than the old ones, 805 versus 655, and way more armor, 123 versus 48 at level 18. The grenade got a .15 AP ratio boost and a bit of a speed buff, about 16% faster. Plus those rockets got 20 mana cheaper at rank 5 and a .5 AP buff.

I got rid of the percentage cool-down on his ultimate becuase doing that essentially lowers Heimerdinger's max cool-down from 40% to 20%.