I play blitz alot and i usually go with a 0 0 30 masteries. Then get a feire charm with i think 4 wards. I will finish my philo then get my lvl 1 boots. depending on how my ad carry is doing, i would either start getting a heart of gold or start working on my frozen heart. My core items are philo, merc treads, and frozen heart.
Here is a "mobafire-ish" guide
0 0 30 masteries
flash + heal
red runes > ability power per lvl
yellow runes > flat armor and 3 gold runes
blue runes > MR per lvl
quints are gold runes
I get grab lvl 1 then max it out LAST
max E first, and W if you cant lvl up E. This way, you can knock your enemy and grab them back, then knock them up again if done correctly!
ferie charm and wards a must in beginning
Then i finish the philo stone
then lvl 1 boots
if my carry is doing well, start building the gliacial shroud
if carry not so fresh, go heart of gold
after heart of gold/ glacial shroud i'd go for mercs ( always grab wards if you have a chance!)
once you have a FH, work for your warmogs and then FoN.
Finish your shureyla's then get a atmogs
Oh and your heart of gold? toss it.
reason why heart of gold i toss? I have enough armor from FH and atmas and atk speed slow aura. and warmog + FoN health regen makes me almost always full health to stay behind to keep the other tam distracted or iniatate and still have enough health to CC them!
Oh and, use brushes to your advantage and never grab unless 90% chance u hit! if you shoot your grabs and they always miss, they are going to be more cautious laning