In 30 to 40% rough, using a medium to short iron, and Full shot mode, I add 15% of the yardage to allow for the rough and expect to land short and have more roll than usual with a particular club.
I might use a punch shot, but it depends on the hole and the wind and I expect a punch shot to roll a lot more than a full shot.
At 20% rough I guesstimate how much the rough will cost in yardage based on what course I am playing.
I won't hit a 3W out of rough.