Talk:Heimerdinger/@comment-174.55.86.105-20100523152920/@comment-24.146.194.181-20120407234038

yes magic penetration affects his turrets... they get all of his mpen as well as scaling with his AP..

Heimer's abilities, turrets, grenades, rockets, all have big base damage compared to the AP part until he gets around 600 ap, and all benefit from mpen, so getting mpen first really is the way to go with him if you want to see fast increases in damage... rushing sorcerors shoes actually makes him quite dangerous early on, and the extra kiting ability of getting boots2 early doesnt hurt... With just the shoes and his runes+masteries, most champs should already be at or very close to 0 effective MR vs him. That means his rockets should be taking close to or more than half most champs health, while his turrets should be able to tear up even tough junglers trying to gank you.