Our simulations show good agreement with available experimental data. If the formulator were to assume that the aggregation behaviour is positively correlated to zero shear viscosity then these simulations would be sufficient to quickly and cheaply guide such a person to useful areas of formulation space which might not be found by a traditional 'trial and error' search. While a simple assumption for aggregation number wrongly suggests that several blends at low pH have may high viscosity, the extent of branching in these systems and the observation of cubic power law growth may hint at these regions as being unfit for formulation. If we discount the regions of nonlinear aggregate growth (e. g. logarithmic and cubic), we could potentially eliminate ≈ 50% of the measurements from the proposed experimental range. We argue that we have shown that this method is a cheap, practical and useful tool for the real world formulator although we acknowledge more testing is required.