You are most likely wondering why the Q first level. This is because you want to be poking them out with Q a lot lvl 1, and it can be a good zoning tool if you hit them directly. Your E can be used on whoever, just make sure your team knows to follow up on that specific person. Your W is mainly used for its passive, but its active is quite good so use it either at objectives or if someone is trying to hide around alcove or the three bushes through bot lane. Another tip for your W is to use it before you push up to check for any lingering jungles in your river or tri-bush.