I know of no way to estimate the amount of 'liquid bentonite' needed "per dose" or "per batch" of IF#2. There are all kinds of variables at play in the liquids (there is no "standard" of 'how much Bentonite to how much water', and no way to judge "one part" when measuring 'liquid volume' vs 'dry volume' per part).
I suggest against trying to use the liquid in the IF#2. It's one thing when we alter a "dinner recipe" or 'substitute ingredients'...it's an entirely different thing to alter the formula of an 'herbal medicine'.