I been here long enough and you really can't win either way . Personally i feel boss event should never been tiered it should be fixed no matter what level you are.
New player shouldn't be able to take advantage of easy bosses . So many times i come here people were complaining how unfair lower level account could farm bosses and higher level can't. This give balance approach if a low level can't defeat boss 1 now so what it should motivate them get stronger and when next time boss event comes they should try again. That's how the game is suppose to be played.