Hey bro, sorry about the delayed reply BTW (damn internet was down for a couple of days).
I don't take any supplements besides creatine and regular whey shakes before and after my workouts. Other than that, I just eat a balanced diet, with a macronutrient split of roughly 45/30/25 (carbs, protein and fats). Currently I'm eating around 3100 calories a day (light bulking phase), split between 5 evenly spaced meals. I eat very little carbs during the last two meals of the day to limit bodyfat accumulation. I'm in it for life, and I'm expecting to to reach my goal of bodily perfection within the next 4-5 years or so.
Regarding your question about abwork; first off I would warmly recommend that you return to the heavy compund leg exercises (squatting mainly, everything else is optional), since they really add size to your entire body- not just the legs- by triggering an aggressive HGH spike. Squatting and deadlifting I hear are the two most effecient ways of accomplishing this (although I personally don't do deadlifts). Abwork should be performed on seperate days preferably, since squatting with correct form actually works your abs quite viciously. I prefer to do my HST on mondays, wednesdays and fridays, and my abs on the off days. But, if you really feel like you don't have the energy to devote to heavy legwork at this moment, then I suppose you can do the abs on the same day with your calves.