If there's one strategy that is simpler, more efficient, and better or equal to the alternative in all scenarios, there's no reason to discuss the alternative in a guide. New players are overwhelmed as it is; no need to add to their learning curve. That is, unless you can convince me that the rainbow grid strategy is at least situationally superior.
This discussion can be summarized into the following question: Is it worth investing in SR weapons?
We can begin to answer this question by answering the following:
At what skill level is a same-element SR assault weapon superior to an off-element SSR (both max-level)?
Mono-grid players will also be interested in:
At what limit break tier / skill level is a same-element SR assault weapon superior to a maxed off-element SR?
Focusing your research on answering questions of general interest, rather than explaining methodological details, will make your analyses more relevant to other users. It'd be different if your methodology was novel and better than current alternatives, but it's not (as far as I can tell). I created and published my tools so others could answer questions like this in a verifiable manner, without having to start from scratch every time.