I wouldn't worry about your side delts, rear delts, and back width suffering in the space of one cycle. The compounds that you are doing will hit all the muscles you are worried about. They won't necessarily all be hit optimally but they certainly won't be atrophying if you are progressing the loads correctly. You are about to enter the heavy and probably most productive part of the cycle so focus on getting to the end and then pushing for some new PBs in all your main compounds.
Compounds are recommended for the entire cycle, not just the 5s, as you seem to be suggesting, but not necessarily exclusively. It's up to you to decide whether you have enough energy reserves to do some isos too. Don't just assume that you need to do them, though. Wait and see how you get on over a cycle, check your results and then reappraise the situation for your next cycle. If you feel a bodypart is lagging you may need to change your exercises around a bit.
Sticking to compounds for the most part will enable you to cover more of your body effectively without spending unnecessary time on umpteen different exercises. A lot of us alternate between A and B workouts so that we are able to do more exercises during a cycle. So, for example, I might do rows and bench one session, chins and dips the next and then back to rows and bench etc.
Check the Simplify & Win thread (link below) for more info.
