Actually Chris, I would go beyond that and not myself really say carbs at the time of an Indigo-3G course are needed for Indigo-3G to “work.” Of course, does “work” mean getting the most effect one can see right at that moment, or working long term? Not exactly the same question.
The article covers much, but there’s more that might be useful for Mantra:
Indigo-3G does more than just, at the time of taking, help ability to handle carbs. It’s a much broader effect.
People’s metabolisms can and do change over time, from exposure to many things. Some of these changes are strongly associated with metabolic disorder, obesity, and diabetes as the worse end of the scale, or impaired ability to stay lean in a more moderate case.
These changes are measurable, involving specific signaling pathways. A very brief and partial summary is that while it’s possible for fat tissue to function simply as an energy depot with no impairment of overall metabolism, much more commonly that’s not the case, and adipose inflammation has very bad effects in the above regards. (Fat cells not only store fat, but also signal the rest of the body and affect the function of other cells and organs.)
Indigo-3G works very strongly towards correcting these abnormal conditions, specifically through restoring adversely-changed gene expression to the normal state.
If you want, you can use the Indigo-3G on your present plan and still evaluate whether you have an improvement, because the above changes will be effected even if carbs are not consumed while taking it. If you have problems in this regard, you’ll get the benefit and it should be quite noticeable after your course. You should also see the training benefits, making a comparison where diet and other supplementation is staying about the same.
However, as Chris says, effect would be even more noticeable if using carbs at the same time, and improvement in training would be considerably more if also using Plazma. The increase in proportion of carbs won’t be a problem.
On the specific macronutrients, there’s probably a typo: your figures add to 1840 calories, which is too low for your weight. I’d consider your planned 2000 to be a bare minimum.