Rule 1: Never, ever "chase" status. Unless you are just doing it for ego purposes. If you travel enough to naturally earn it, the benefits of status are a small bonus. Nothing more.
Rule 2: Never, ever, buy a flight due to a DSC promo that you would not otherwise have needed. Unless you enjoy paying hundreds of dollars in unnecessary tickets just to get into a lounge, which will be crowded and cough.
Rule 3: Seriously consider what you expect from status. You will find that at least 95% of your expectations are false. Unless a fellow human saying "hello " to you really really does it for you, you will always find that you are treated effectively the same no matter what your status. The crew don't give a rat's behind if you are a FF mogul or on an award ticket.
Rule 4: Taking into account Rule 2, treat DSC as an opportunity to tweak otherwise necessary tickets. The DSC help towards LTG, etc. But refer to Rule 3 when thinking about this.
Rule 5: Follow Rule 4.