To quickly burst E your target then instantly AA W and R as soon as the animation ends. Follow it up with some AAs.
To make your E W easier you land you can hide some of the animations with R. Continue to AA after that for the kill.
A normal trade will start off with Pow-Pow and AA W, then AA twice more and use E. Q to AA more with Fishbones.
W to slow your target then E. Swap to Fishbones with Q and AA your target while they are crowd controlled.
Use your E and W together to make it easier to trap. AA while your opponent is crowd controlled.
Make the most of the time an enemy is crowd controlled by using E on your target then AA three times with Pow-Pow. Then use W and instantly Q for more AA's.