Pros
Really fast jungler
Gap closer
Got a stun
Tanky but still high damage output

Cons
Imagine if he had a real weapon
Squishy until you get frozen mallet

1) Ask someone to damage the wolves, but just make sure that they don't last hit them

2) Get a leash at Blue buff.

*Leash is when you get one of your team-mates to hit the monster for you so the monsters don't attack you for a short while

3) Finish off and go gank. If no lanes are suitable for ganks kill wraiths.

4) Keep looking for a gank.

5) No lane suitable for gank? Finish off Golems and Red Buff and go counter-jungle until there is a suitable lane to gank

6) Just roam around killing whatever camp is in your way.

1) Make sure the lane is suitable for ganking. (Over-extended or Low health)
2) Let your team know that you are ganking so they will stun/cc the enemy
3) Wait for your target to step out from behind minions
4) Run up to the target with Counter strike. (Do not use Leap strike!)
5) When they try to run away use your Leap strike and follow up with a auto attack into Empower
6) With Red Buff this combo will usually land you a kill.