I know what causes static i and is air flow is however which combination works best flash setup in that case
I always go for positive pressure, however in modern cases it is a little hard. Neutral is ideal but impossible. Negative is great depending on the heat output of your components.
It depends really.
Neutral with a slight bump towards positive is ideal so slightly more intake than exhaust. The specifics though depends on what you have in terms of the case and fans and whether you have an AIO/loop or not.