In my opinion it depends on the person. For myself I have taken the following groups on the same days:

College Algebra
Freshman College Composition (I later found out TESC would not accept this one )

U.S. History I
Analyzing & Interpreting Literature

Introductory Sociology
Introductory Psychology

Princples of Management
Principles of Supervision

I enjoy English (it comes easily to me) and didin't even really study for FCC and A&I Lit. So when I did those sets I took Algebra and U.S. History I first. As for the last two sets I believe that is a lot of overlap between sociology and psychology, and I think everyone, who has taken managemet and supervision, will agree if you study for one you should be able to do the other one. So, all in all, if you feel comfortable with the material, and you are willing to risk it, you should go for it. It does not get much better than to walk out of your testing center with nine credits. That is what a full-time B&M college student would take more than half a semester to get!

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BSBA Marketing Thomas Edison State College-63/120

College Math-66, College Algebra-64, Analyzing & Interpreting Literature-67, U.S. History I-66, U.S. History II-61, Information Systems & Computer Applications-59, Biology-61, DSST Introduction to Business-61, Introductory Sociology-65, Introductory Psychology-52, Principles of Microeconomics-54, Principles of Macroeconomics-47, Principles of Marketing-68, Financial Accounting-47, Introductory Business Law-62, Principles of Management-70, DSST Principles of Supervision-64, DSST Organizational Behavior-68, English Literature-61