Its simple - soak and try to be near lanes for gaining DPS. With all this talents you will be able to kill anyone - every tank , you will win 1v1 against every assassin in a few seconds, you can pick every hero from crowd, kill him in 3 seconds (Morales) and teleport to safe.
Before assassination just press any ready abilities+ulti and in teamfights dont use teleport to block or pursue, save it for escape.
This hero is really scary, in teamfights after berseker I can kill 2-3 heroes, until now no one killed me in 1v1 (Illidan, Thrall,) I can kill any tank and luckily no one plays Zeratul, so Blizzard gives a **** about him.
GG HF