I found with both of these events on all characters the things I enjoyed the most was 1) Going on hard or easier and choosing a team composition that wasn't what you would default to as the best characters to choose for that mode to see what the other characters were like in the modes (i.e. bit hard to have the wiggle room to foot in a less than ideal character on the harder difficulties).

1. Going for one of the best choices of characters / team composition and trying to complete the hardest difficulties.
   We haven't managed to beat legendary yet though, but I'd like to before the event goes away.