SKILL BUILD

Level 1 - Smoke Screen
Level 2 - Blink Strike
Level 3 - Blink Strike
Level 4 - Stats/Backstab
Level 5 - Blink Strike
Level 6 - Permanent Invisibility
Level 7 - Blink Strike
Level 8 - Backstab
Level 9 - Backstab
Level 10 - Backstab
Level 11 - Permanent Invisibility
Level 12 - Backstab/Stats
Level 13 - Smoke Screen
Level 14 - Smoke Screen
Level 15 - Smoke Screen
Level 16 - Permanent Invisibility
Level 17 - Stats
Level 18 - Stats
Level 19 - Stats
Level 20 - Stats
Level 21 - Stats
Level 22 - Stats
Level 23 - Stats
Level 24 - Stats
Level 25 - Stats

Justification

Smoke Screen is gotten at Level 1 because its silence is the same at all levels and it helps you escape and take less damage early when you are the weakest. Blink Strike is then maxed as it is your best chase, escape, farm skill. I have been getting a lot of comments from people who argue that Blink Strike is better at level 1. Usually I would disregard these people as morons, but in some cases Blink Strike could be more useful than Smoke Screen. I usually prefer Smoke Screen at level 1 because with Blink Strike you need a unit in the right position for your escape, whereas Smoke Screen can be always be used.

Stats or Backstab can be gotten at level 4, Backstab would be better in a lane with 2 melee heroes where you wouldn’t need to worry about harassment as much, stats are better against ranged opponents where you get almost no hits in and you need the HP. Permanent Invisibility is gotten at 6 obviously. After that max Blink Strike and Backstab, getting Permanent Invisibility at 11, then max Smoke Screen and Permanent Invisibility.