QSW questions-Please help!

Hi, any of you who've already gone through CSQ process, please help me on this.

I'm trying to figure out whether it's better to do FSW or QSW. At this moment, my question is

1. Language: does QSW program have a TEF and/or IELTS guidelines as to which level(score) would correspond to which CSQ points? such as 0-16 french and 0-6 english points in Language criteria. I know FSW has very clear guideline on this, but I couldn't find anything on CSQ language points. At least some good idea, if not a clear guideline is available?

2. Interview: Is only primary applicant going for an interview or with spouse? Will the interviewer will determine Adaptibility points AND language points? Is this a pass or fail deal?

3. Area of Training: based on the list of the Area of Training, with a foreign credential on Business Management(Bach-4 years) I get 6 points but Business Management (DCS-3yr college level), I get 12 points? Can I ask to be considered for college level? How can I do that?

Your expertise will be greatly appreciated!

Joy