[{quoted}](name=Wrath 0f Zaun,realm=NA,application-id=3ErqAdtq,discussion-id=AxIKVKLs,comment-id=,timestamp=2017-05-08T05:30:29.526+0000)
WHEN exactly DO i use the fast combo if not trading in lane or getting a pick?
What do you mean? You generally want to use it whenever you can, just make sure not to cancel autoattacks. Or do you mean when to do the full Q combo?
Only use the full Q combo against specific matchups when there are not too many minions, examples are: Sion, Nasus, tanks in general when they don't have a key skill up. And then for all in of course when you plan to kill your opponent.
Another thing (I just watched your opgg): only use your "Riven JGL" runepage. Lethality is pretty bad right now. Build something like DD into BC unless you need Maw for MR. Ideally take FoB against tanks/bruisers aswell.