Okay, I found something to fix.

First, you don't really get 15% CDR from Presence of the Master. It reduces cooldowns of summoner spells (Flash, Exhaust, etc.) but not abilities. So in fact, this build only has 24% CDR (9% from masteries and 15% from Shurelya's). Getting it higher is important on AP Blitz in my opinion.

Second, your AP is way too low to be competitive if this is AP build. Since Blitz has only 2 abilities that scale with AP, you need highest possible AP from fewest possible items. And here you have just 3 items with total of 240 AP. I know they have nice effects other than that AP but it just isn't enough.

This build also lacks survivability to be called "tanky". You get health from some items, and a bit magic resist, but it might not be enough.

No offense but in the current state of this build, it lacks pretty much everything it needs: CDR, AP and maybe some survivability. You should really learn some mechanics of the game (ie. Presence of the Master not CDR). Also add sixth item to this build since readers might want a total build. You can add multiple choices as last item but don't just say that you can pick any item you want.

This build needs a lot of fixing to use full potential of Blitzcrank as AP champion, but I hope you keep working on it. I'm also one of those people who think AP Blitz rocks in comparison with AD Blitz :)

sorry but this is just ap build (but i don't like ap blitz), not really anything tanky about this build... tank need armor and mr not just hp

this build is worthless , ap is useless and u have nothing that make you "tanky"