Item Buying :
1. Doran's ring (sell it when you are about 16-18 lvl and buy zhonya's Ring)
2. Sorcerer's boots
3. Catalyst the Protector (at 18 lvl buy Bunshee's Veil)
4. Mejai's Soulstealer
5. Rod of Ages
6. Royai's Crystal Scepter
Initially play carefully. Don't go too close and hold on you'r tourets.
When you are doing better, stop enemy in RUNE PRISON and throw all of your spells to him.
I know, i'm a noob.I play like that and sometimes i've got 30 kills, sometimes 7.
You don't have to apply my build. :P
And sorry for my English (I'm Polish).
I'm waiting for some Coments.