Thank you so much for your suggestion. How about is there a way to figure out which stats are mostly used and needs updated?

Another question...For two 150 GB database.....both of their ldf files are in the same folder...So, is it recommended to do maintenace one by one or we could do in parallel....I am kind of worried about doing parallel as that could fill up the log and more use of tempdb.

Another question...Is setting up Auto Update Statistics to true is a good practise? Then that way, we don't need to do maintenance on statistics?