I've been playing Heimerdinger a lot since I've read this guide, and I have to say that it is perfect. Using a Mejai's is the best advice you could give a Heimerdinger player. You will always boost it to at least five. I usually end games with at least 12 stacks on it, and have easily gotten 20 in many games. With the new buff to Heimerdinger, the turrets now target offensive enemy champions making getting assists that much easier. You are now able to lay "traps" for opposing champions that are hindering your team mates by placing turrets in a bush and letting the Pantheon/Akali/Mr. I'mma eat you see you and chase you into your trap. With the new zhonya's items, the Mejai's goes a long way. I suggest editing a few things to show what you can do with the new patch. Tower sieging and team fights just got a lot easier for everyone's favorite big-brained yordle.