I have some white hat websites who was ranking on top for money keyword. But by the recent phantom update they goes down to second page for main keyword. After making good high quality link there is no improvement in ranking even single step. I used all methods niche related site redirect, high quality links, niche related links. But its been a month not a single step improvement. Now is it possible if i make a sub-domain and start working on it will it rank or not. Please share your tips and knowledge. Thanks!