Digital BW, The Print

I am pretty sure that everyone interested in ink mixing has read Paul's article with great delight and enjoyed the journey.
From my perspektive the open question is what do we really need to prepare a base solution.
The mixture that Paul is using contain Kodak Photo Flo and Edwal LFN.
Kodak Photo Flo has been for a long time in our darkroom. Newer wetting agents such as Edwal LFN and other have shown superior performance.
To my knowledge Kodak Photo Plo consists of two major ingredients: Propan-12-diol and a Triton X100 (Surfactant from Dow).
Edwal LFN is a newer "low foam" wetting agent that consists of Isopropyl Alcohol and same sort of surfactant (probably like Plurafac LF 901 from BASF ?)
Coming back to my question - what do we really need ?
Do we need all these different surfactants are does a single one like Terigitol 15-S-7 (Paul uses some for printing on watercolour paper (my favourite media)).

Any thought and insight on this topic is highly appreciated.