Xin zhao has a good level 3 so try to get a kill early or burn a summoner before your first back, stay close to lanes that you think gonna get ganked because you have a great counter-gank so you can pickup some easy kills.

E -Max your E so you have less cooldown on it for more effective ganks. While you are ganking try to come behind the enemy and use your other spells to see if the enemy will flash or jump away then use your E.

Q - Max Q your second spell for more damage.

Your combo while ganking after 6 should be like this: Smite, W, Q(1st attack,2nd attack),E ,Q(3rd attack), R

Pros:
- Very heavy damage early
- Few CC abilites

Cons:
- Hard escape
- Bad camp clear
- Vulnerable to counter ganking