If you intend to use high ISOs with your K-7, I would recommend that:
- you set the highests ISO at 3200;
- you consider if you prefer (or not) to do in-camera High-ISO correction or PP with a dedicated noise reduction software (eg Noiseware); see thread by Adam and the following discussion at
https://www.pentaxforums.com/forums/pentax-dslr-discussion/106600-k-7-high-iso-success.html;
The high ISO correction is worthwhile to minimise PP, but I prefer personally to do PP with Noiseware.
Will you use a flash ? In the negative, a fast prime lens is a must (with a large aperture like f 1.4). In the affirmative, a good flash will hep.
Otherwise I would use your typical settings. For me, these typical settings are P mode, AF-S, Center-focus, 14Mp two stars, ...
Hope that the comments may help....