They will be privileged to die at your feet
Spears. Spears all day. Just farm and spear, don't fully commit to an engagement unless you know you can kill them. At level 3-4, with enough spear harass, you should have brought them to about half HP and if you have ignite, that is a kill for you. Other than that, do not engage fights, let them come to you to proc your passive.
You shouldn't be unless you have it warded with your flash up. But in the even of being ganked from behind, stun ---> Flash(or walk if they don't have exhaust/slow/stun).
Getting Tower dived?
You're gonna win if you select who you stun correctly. Always stun the one tanking the tower and burst him down as fast as possible. Then dance around your tower and use your spear/stun. Never use heart seeker strike UNLESS you have stun up.
Tower diving them?
Best early tower diver hero. Only dive if they are half health/jungler is elsewhere, the tower is nothing.
<u>Rotation for Tower diving:</u>
Got your Ulti?
If they are pushing your tower, use it to get back to lane quicker.
If you pushed them to their tower, gank mid. When you ult in, spam the shit out of your stun on the mid. You will insta hop to them even before you hit the ground. Then proceed with your Q --> E --> Q rotation