siliconbrits.com wrote:
Can you help me rather than tell me what my responsibilities are?

OK, OK, you are right. My apologies.
This is what I do personally:
1. I make sure —using JCE— that my users have access to only a few selected CSS that I place in the editor.content.css. JCE is set to use that file for display when editing. These CSS are obviously also present in the template_css.css
And I tell them to use these ALWAYS systematically when entering any text. Never use the other "Formatting" options offered by JCE/Tiny (Bold, underline, color, background, etc). In the last job I did for a corporate, I even edited out most of the JCE icons I did not want to show as a choice to users. This lets the site looks as it should whoever the user editing.
I take off the Font-size, Font-Family (defined through CSS). I leave the Format but I define the h1, h2, etc. in CSS.
This makes me add for example CSS like
.bold {font-weight: bold;}
.size12 {font-size:12px;}
#center h1 {font-family: Times New Roman, Times, serif; font-size: 16px;} // the MainBody is in a div with the id="center"
etc.
2. I tell them to use the advanced image capacities of JCE and NEVER use {mosimage}.
3. I tell them to always Preview the content after Applying changes.
This is a reasonable approach which does not provide a full WYSIWYG (Would they get that in Word?

), but is really good enough and does the job.
I would not sell a Joomla! site without being sure all this is done beforehand.