Hi, I'm Bukra and this is my first guide, and seen by many parties to Blitzcrank almost always support arm and if I do not really like to say ...
For my part and tried to customize it with a method I use to Tryndamere and I really turned out very well
Now I will explain them my guide and results

The problem always Blitzcrank is the lack of mana, so we start withand potions,provided that we can give the final blow to the minions to gather some gold, if we touch enemies from range, we have to fight in the tower and try to attract them with the Rocket Grab and if we are at level 2, we should have the ability and Power Fist, so we left at the mercy of our colleague
At the beginning Blitzcrank is more than just support, but thanks to the runes of critical and Mastery Trees, each of our Power Fist gives considerable damage
Thus with the aid ofmore critical damage, the damage is significant
The idea of ​​enhancing the ability Overdrive and Power Fist with runes cooling ensures a greater damage in a short time, as too often happens that my Power Fist is the last straw i need to finish a fight and prevent death
The downside of being on AD is that it is more devil to receive free attacks but it compensates with a great power to harm, in turn also has against so great that almost everyone is easier to attack
So we turn to mana granted Manamune added that helps us in critical moments Mana Barrier

As I said before, I gave this style a lot resoltado I think it is more because no one expects a hit so hard Blitzcrank
I apologize if by some chance it is not understood correctly, but is that been using a translator to create this guide