You never approached with anything that wasn't nair. Now granted, the move is amazing, but if you aren't capitalizing on it when it connects, then you aren't doing something right. Higher level players will destroy this style of play with dash dance grab and really simply combo follow ups. Mix in drills and grabs with your approaches, and at mid percents nair to other follow ups, like down tilt, dash attack, up smash, turn around up tilt, or grab, all dependent on di. Shine is only good if you are going to thunders, it knocks them off the stage, you need to be safe, or if you are going to punish their roll (assuming they miss their tech).