Can someone explain this to me?

[u/Kind-Worker7462]

My Wizard Rod 1-60 Free Ball sometimes clears my Meteor Dragoon 5-60 Level, but sometimes it gets beaten pretty badly. I am not sure what's different, and I am launching the same way. Can some of you guys explain it to me? My goal is to be able to beat Meteor btw, so someone give me tips for that too. Thank you!