Just follw the GH recommendations but lower the amounts doses to one half or two thirds of their recommendations. All manafacturers tend to recommend very f high EC nutrients (strong concentrations). If you can afford it dump your nutrient reservoir at least once per week or tow ekks at max. More often ifusing a resrvoir that is small in relation to the number of plants grown. Daily bring the resrvoir fluid level bachk up to the strating level, raed ands writedown the amount of water added as wellas your newph and EC, then you EC and ph.
The lLucsa"formulation" is not a formulation created by Lucas but simply a dosing method suggested by Lucas using GH FloraMicro and FloraBloom and his suggestions on how to dajust the EC and a suggestion on how when to change you resrvoir out based y upon how long it takes to replace a predetremined amount of nutrientw doing dah justment additions to raise the EC daily.
It will work but not as well as when all three Formulations as used as directed by GH. It is another one of those things where when you call them on their bullshit they persons say, "I found it works well enough." It is like ghaving a non monogamous wife yo u ale ways brings home a paycheck and still has sex with you. Some people would say that is well enough and settltefor the far from perfect maraiage. Some people want and go for and therefore often forget much better. Lucas and his followers are settlers for just "well enough." I imagine to some growers if what the spend on growing is equal to the value of their harvests in one year then they conider that is well enough. Myself I like a 700% to 1000% return on investments yearly based on a maximum one year depreciation on nearly all actual growing equipment.
It is like many poorly used designs, methodologies and equipment. People will post something and defend it iver and over until other srepeatedly show them what they have posted is sad. Their excuse when called out is,"It works well enough." OK Some ocassinally admit that there are much better choices, some hold on to their egos instead. Truth be known they nearly always give up and change they jusy refuseto admit to changing. The sad thing is when their high;y touted grow journals and such turn out to be prety lame and way behind the curve, like the Sad small tube aero grows with low prssure pumps spraying water 24/7 they remain online and get read by newbies due to their large viewing or repl ynumbers. Sad old and out dated things should be full of bad information amd perpetuated myths that still pop up on the first few pages all the time that shuold onnly be accesed from the archives. There would be a vast improvement in the quality of grows and the qusestions asked and the replies given if the old stuff was resting in the archives where it belongs.