The reason why i have written this guide is because out there are no good AP guides for Blitzcrank. Blitzcrank full AP is one of my favourite champs because he can cast his ult after about 20 secs because of its low cooldown and does (if ur item Build is full) over 1100 damage. Thats great for teamfights and for finishing enemys.

Tipps and Tricks:
- in early game try to pull your enemys in the turret range and use yourskill so that they get more damage. Then they are mostly dead if u use.

- Blitzcranks 1-2-3 combo is really powerfull. First try to pull them to you, then use yourskill and then your ultif he isnt dead use. Most time if u use that combo they are killed because of your laning partner.

- Use Yourskill to run away if its necessary.

- Use Yourskill to push turrets.

Summoner Spells:

I tookandbecause if your 1-2-3 combo isnt enough than you needto finish the enemy,is good to escape and too reach targets.

Optional:

You can useif your mana is not enough but i think its not as useful asor.
is optional too, but its a matter of opinion if u useor.

Masteries:

I use the Masteries 9/0/21 including magicpenetration, bonus abilitypower , reduced cooldowns and manaregeneration.

For Runes i take 9 x MPen Marks, 9 x 0,065 manareg/5 sec per level Seals, 9x AP per level Glyphs, Flat AP Quints.

I use this Runes because i did several Tests and it worked very well with this runes. So try it and if you dont think this runes are the best one for Ap Blitz just take the ruens you think to be best on him :)