Blue Blitz build

The question is, how are you going to afford that.

Does it do enough damage for a support tank? What? Both of those things (support and tank) are usually characterized as not having damage but CC and utility.

How are you gonna charge that Muramana?

It might take over 30 min to charge Muramana and get that gold amount.

So late game when everyone has 6 items will this build work? With the grab and 2x dmg punch can i expect to take 50% hp on most champs?

I do something similar to this as Blitzcrank top. Lane can be pretty difficult but the utility he brings is unmatched and his damage isn't bad if he can stick.