Just a few comments to add on to Ironman's.
1. If you are doing full body, IMO, the best strategy would be to use mostly the major compound moves, that target mutltiple groups, rather than to focus in on rear or front deltoids. Get the most bang for your buck.Pullups and bent rows do just that. As to the rear delts, they get plenty of work with rows. As to the front delts, they're more than covered by front and bench presses of various angles.
2. The back is very complex, and is responsible for many functions. One exercise won't come close to covering it. I like to break it down in terms of movement.
Shoulder elevation, mostly the traps but with many synergists. Thinks shrugs, cleans, presses, etc.
Downward shoulder movement, mainlythe lats, with many synergists. Think chins, pullups.
Scapula retraction, main rhomboids, teres,again , many synergists. Think rows.
Erectors-flexation of the spine, and working isometrically, keeps the spine in line and tight. Think Deadlifts
When doing full body, it reall isn't necessary to do them all in one session, maybe spread them out over 2-3 sessions.