When you are pieing a corner, a thing you should keep in mind is the relationship between your cover and your engagement area.
If you can see daylight between your opponent and your cover then you are too exposed yourself.
You only want to “roll out” from your cover enough to be able to engage your opponent.
If there is more than one opponent out there you do not want to expose yourself to the both of them at the same time.
What you should strive to “aim for” is..roll out and engage the first visible target……
Then roll out some more and engage the second.