last time i check

the chest was a vanity muscle.
That being said lemme pick your split apart.
Firstly..even if certain parts are lagging.. i'd NEVER (unless i was a huge top level pro...stressing on the huge part) train certain bodyparts for just maintenance. IMO one should continue to train everything...putting 100% into each bodypart.
That being said, i'll address your question.
Your legs (quads hams calves) arms (bis; tris and forearms) and traps are lagging. Here's what my approach would be
Day 1: Quads; Hams; Calves : Leg-curls (first); Squats; lunges; Calf-raises (on leg-press machine)
Day 2: Chest; delts (maintenance): Dumbell Inclines and Flat press; Seated lateral raise and Dumbell press
Day 3: Rest
Day 4: Back (maintenance); forearms
Day 5: Rest
Day 6: Arms; Calves; : alternate dumbell curls; Dumbell preachers; Close-grip bench press; Tricep pressdowns; seated Calf-raise; Standing Calf raise
Day 7: Rest