Route: Start at wraiths then do wolves and blue then back to wraiths, red, and finally golems. If you see a possible gank put a point into W.

Pros:
Good early damage
Great ganks
Great chasing power
Good at saving allies
Naturally beefy
Super fast jungler/counter
Only 1 ability isnt AoE

Cons:
Damage falls off mid to late game unless you do something about it (Haunting Guise helps a TON)
W can make you turret dive if the target flashes(could also be helpful)