Good questions. First, consider keeping your <a href="http://www.t-nation.com/store/products/plazma"target=“new”>Plazma at two servings for every workout, assuming all 4 of your training days are tough lifting days. The carbs in Plazma can’t be counted the same as whole-food carbs. Very different affect on the body. In fact, they’re thermic in nature. So one good option is keeping Plazma intake the same on all lifting days, then if you need to (and you may not) adjust carbs higher or lower in your regular meals to fit your carb goals. My wife used a similar approach when dieting for figure competition: kept workout nutrition the same then made adjustments elsewhere with her solid food intake. As John Meadows has said, never sacrifice the workout period.
<a href="http://www.t-nation.com/store/products/finibar-competition-bar"target=“new”>Finibars would be a great addition on higher carb days. Just have one about 40-60 minutes before training, and maybe time your toughest workouts of the week for those days (leg days etc.)
<a href="http://www.t-nation.com/store/products/brain-candy"target=“new”>Brain Candy is the most optional out of all those choices. Definitely a nice addition if you like the effects, but we always emphasize taking care of workout nutrition first when budgeting.
A final option would be adding a <a href="http://www.T-Nation.com/store/products/MAG-10"target=“new”>MAG-10 pulse post-workout if you’re looking to ramp things up. Mag-10 is also great for conditioning-only workouts to speed fat loss and preserve muscle for extended “cardio” type workouts.
Does that help?