To engage from a very long distance away F then instantly Q and AA. Immediately start your R, then AA W and E after.
Use R on your main target then instantly F to redirect Depth Charge through other enemies. Q your target during the knockup, then AA E W AA as quickly as possible.
Use E then instantly Flash. AA W and quickly cast R, AA after then Q as they hit the ground.
When actually trying to burst an enemy Q then mid air hit E and instantly AA R once you arrive. During the R knock up use AA W.
AA your target then Q to a wall, using your E to hit your target before you escape to the wall.
Before level 6 all in leading with Q and AA after you land, then quickly W E.
When in melee range AA then instantly E. Q right as the root is about to finish, then AA W as soon as you can.
After level 6 use R and wait for the knockup to land. Q to the target and AA W instantly when you land, then E AA.