What is recommended to select as client

Hi,

I my development, I have created -

1. Attribute views with constant filter on MANDT/CLIENT field of tables (e.g '001').

2. Analytic view with constant filter on MANDT/CLIENT field of data foundation tables along with above attribute views in logical join.

3. Graphical Calculation view (with calculated measures) using above analytic view.

What would be best approach -

1. select cross client in attribute/analytic/calculation view? or select session client (this is default option)?

2. select 'execute in SQL engine'? or nothing selected (this is default option)?

3. select any specific schema for 'Default schema' or keep it blank (which is default option)?

Thanks for reply !!