Good routine bro.

That's why for delts I hardly ever do any extra presses since they get so much stimulation like you said from working chest. I focus completely on my side heads and might do some lighter presses after working my side caps. Rear delts I do on back day since essentially hitting the rear delts also hits the rhomboids and mid trapezius which are back muscles. Same with traps I do them on back day. As for doing light bi's and some light tri's. I may try that once I'm on a cycle but being natural right now I want to concentrate as much on stimulating my type-IIA and IIB towards building as much muscle as possible so a light day is out of the question for now as it might interfere with recovery and might gear my type-IIA muscle fibers more towards endurance as well.

LOL now can you imagine I used to do chest, shoulders and tri's all in one day. Still made good improvements. I have well developed delts, tris, and a pretty good chest as well. Genetics helps of course. hehehe that's why I have 18 inch calves untrained. Now I am going to do calves as well they will get stimulation from the light jogging I do on cardio days but usually during winter I never train them at all.