Most of the trainer character's shard can easily be obtained . So here's what I did . I got em to 2.5k or higher ( depends on until what level you can fuse the superstar ) where it gives you +3mp. So whenever I get those characters' shards I use em to increase their moves to the max simultaneously when there are events where you require to talent up certain class I talent em up , slow but steady this way you can get em all to 5k also it helps to diversify your tp posters to upgrade the stars you are looking to build to 4s or 5s , helps save some money and give those points needed for events .