2 points early to harass as much as possible. This is essential against melee heroes such as: Pudge, Tiny etc.
It's a blink what else do you need to know.
Some skip ultimate to max scream first, I don't recommend this however because ultimate is still amazing at level 6.
Try and use it on more than one person while in teamfights.
When ganking you can freely use this.
Early Game
You see this bad boy right here? You gotta rush this little f*ggot, the faster you get it the better.
Core Items
Your bread and butter. Blink in, hex, blow all your nukes and get out.
This will get you some big numbers to look at.
I only added this cause it makes you shoot red beams instead of some little daggers.
Manta cause by now the enemy team will have a silence or CC of some sort. Use manta to get rid of it.
Situational Items
Get this if they have evasion.
Get this if there's big melee damage on the other team.
Clinkz, Lifestealer etc.
