Talk:Heimerdinger/@comment-99.237.78.15-20121112001631/@comment-5052127-20121112125145

The defense bar for him used to show as almost all the way to the top actually, and there were no changes to his health or regen since then. Those bar values for stats are made by Riot and supposedly also factor in sustain not just how tanky you are, and so they decided that even though he is quite probably the least tanky character in the game, that his sustain passive warranted them putting his defense bar that high.

The passive really isn't that much except in lane... in lane it's really quite good and actually one of the best lane sustain passives in the game (compare it to garen's passive for example).