Your masteries are pretty important. Youre not gonna need deaths fire touch since youre gonna be able to oneshot everybody. Except Hyper tanks like Or . Youre taking Stormraiders Surge because youre gonna shred so much HP within seconds and you wanna keep up with them if they got flash or Ghost. On early levels its gonna be super useful trust me.
Now this is very important for your early game! DO NOT start with your Q. Your W is a good finisher and also a good engage. Youre gonna cc them on lv 1 which they wont expect. meaning youll have a easy auto and your support can follow up. if you got a leona as supp its already GG you just got first blood cuz you skilled W isnt that great?
Also you can roam to midlane and CC the enemy midlaner from far away or even finish him. Means a KS with style.