Become acquainted with how to use the PUNCH shot out of 30-40 ROUGH or thicker. Just be prepared to PRACTICE and develop this.
This AVOIDS the problem with irons which when hit with a FULL out of the Rough, where they immediately dive to the ground and you get very little distance.
Use the PUNCH particularly if you are in FAIRWAY Rough and need to get some distance. (Handle the PUNCH with CARE around the greens). Be prepared for the ball to behave differently - club distances are SHORTER than with a full swing - ball flight is LOWER and be prepared for a significant amount of bounce and roll as the ball runs out. BEST if you can land it in FAIRWAY to maximize the distance you get. (You will generally NOT want to PUNCH if trying to carry over a distant hazard.)
ALSO - with PRACTICE you will need to develop a FEEL at first for the indicated CLUB Distance AND for the actual distance you can get. As a general rule if you hit out of 30-40 you will get far less DISTANCE than the maximum indicated - and you will learn to "feel" to play one or sometimes two clubs HIGHER than the indicated distance, even with the PUNCH.
Practice this - it addresses the "How do I get some DISTANCE out of Heavier ROUGH?" issue.
For your particular scenario - there is NO secret recipe to landing the green at BPB #4 in 2 shots - it involves a significant amount of LUCK - just like golf in real life.
Regards, AtlantaCoaster