Okay i may have miswrote my question so lets do this one last time: Given maybe X amount of traffic, pageview, clout, sales , example maybe 600000k clout/6000$ sales (assuming 1$ = 100clout)

how do i calculate and derive content for a single illustration (banner, a4,b4 etc), based on existing datas and trend, so to add the right amount of "polish, renders, anatomy" etc
to the image that will effectively add(or decrease) value to the image

basically appraising the image as i work and add it, knowingly figure out the values incrementally... especially since graphic design or advertising seems to "forecast" the public in their work, as much asbhow little color the rendering artist like kimjunggi or homestuck has while still attracting numbers compared to some over rendered daz 3d which is mechanically correct but is not artistically: obviously that last sentence seem to answer everyrhing but since people/buyer follows a certain spectrum... for the last time, i d like to understand this spectrun... maybe in (simple) mathemathical form as in equations so i can predict the styling, design, anatomy, construct, etc, and appraise whst i do, confidently, and avoid wasted hours of work....

>i still do the gruntwork myself, and 'follow trends' so this is supposed to, help me be more correct and original
>also avoid, the not to do
>also just curious about big design firms