When writing any article for public consumption, it is better to show deep expertise in your content – without getting too complicated, of course.
If you have a specific area of expertise, then focus on that and maybe explain the issue (or more importantly, the solution to that issue) in three different ways within the one article.
This allows you to insert a few, more-focused keywords into your article.
But it also makes your article more memorable to the reader than an article which contains six different topics. (It is much easier for us to remember ONE thing when it is told to us in any presentation than when we hear several).
If you have shown ‘depth of knowledge’ in the one area of your business, your reader is very likely presume that you are competent in other areas.
Finally, make sure you tailor your article specifically to your particular client sector.
Most businesses stick with one message that they send to all their prospective clients with the expectation that they will respond..
It would be better to alter your message depending on the individual type of customer you are targeting.
Maybe change your headline to suit each sector – A headline that is relevant to your target has a much greater chance of catching their attention.