Only you can decide that! It is important to understand in depth the risk profile and return characteristics of any investment approach you are using. By reading the background and browsing through the screen lists generated, you can get a good sense for the kind of companies that a screen favours and any industry or risk concentration that a given screen may generate. When determining which screen(s) you might want to follow, it's worth asking yourself the following questions:
Most importantly, remember that screening is just a first step on a journey. There are qualitative elements (e.g. the calibre and honesty of the management team) that cannot always be captured effectively by a quantitative screening process. Detailed fundamental analysis of any stock you are considering for purchase is likely to be important for successful investing.