1. You don't need sightstone, for these reasons
a. Your going to be winning so hard if someone tries to gank, then they die
b. You only need 2 wards, 1 for dragon den (so you can steal) and the other for baron
(so you can steal and then laugh in all chat
2. You don't need face of the mountain for this reason
a. Your going to be so fed anyway, you don't need a shield

Because it's right

Back at level 6, your just that good, you cant afford to recall. Unleash your true powers as a blitzcrank by sitting at the edge of a turret, nobody will dare approach. If they do dare approach hook this trash under turret and win. If its a 1v5 and your friend tells you to back out, they are not your friend good sir, just hook them, and win. Low health may seem like a reason to recall, but it isn't, in fact, its your best ally. use low hp to lure them into a turret dive, then E and R to kill them.

You win the late game in 3 easy steps
1. Kill their adc over and over again
2. spam your mastery regardless of what it is
3. Taunt the fact that the support only mains support because they cant cs, and that their adc is lvl 2 while the support is lvl 4.

stay at the front of the pack, use righteous glory to walk up to someone faster and then get a better hook (laugh in all chat if they flash away and you still get them). If the enemy team is brainless, just walk up, and sit there, use your abilities, but sit there. If someone tries to start attacking the ACTUAL damage dealers hook them away and make them focus on this "easy" kill. If you build blitz right, it will take you at least 10 seconds to die, if you even die. If your low, don't even bother recalling, just sit there and wait for warmogs armor to heal you faster than a soraka can.

Boots of Mobility - You can literally make their team flash for you, and you still outrun any of them.
Frozen Heart - Armour, mana, CDR, its self explanatory
Righteous Glory - If those idiots flash away, use it, and eat them up.
Warmogs Armour - Good sir you have armour you have health, you have insane *** regenge, what more could this guve you?
Rabadons Deathcap - Because your max lecel hook (300 damage) isn't enough.
Guardian Angel - if they took 10 seconds to kill you, imagine them doing it again.