Lesser Seal of Knowledge why lesser no the mid rank

I have not tried it yet. My AP build is fun because my turrets own and I can nuke pretty well. This looks interesting, but would seem like it would hit like a limp noodle.

I think this is a pretty good Heimerdinger build. By getting the CD reductions first, you are still able to get kills, and it makes setting up turrets a breeze. I played a few games with this build and did very well. That being said, I switched to using an AP Heimerdinger and I like that better.

I think this is a pretty good defense Heimerdinger. I would switch Clarity and Ghost to Fort and Teleport though. And take all the points out of defense tree and put one into Spatial Accuracy. Then 4 into Archmage's Savvy, 1 Deadliness, and 3 Sorcery. With all the cooldown rates and mana, you will be unbelievably fast with setting up turrets where ever you need to.