When I promoted into my current D4 league in season 17, my league was ranked as the 1st or 2nd hardest D4 league in the US. What you want to do is sell or fire the players that won't help you at this level, buy better players that will help you survive in your league, and since you do have a 17k and 14k SG, 15k PF, you should be alright IMO. What offense do you run? That can also play a factor in your success. Good luck, Lealster, I am sure you will do fine in your league.