5* shard arena champs?

Crine60

I know I have to use my 1 and 2* in the upcoming 6* shard arena but is it the same for the 5* shard arena or can we use other rarities also? I am trying to do some ranking before the arenas start and need to know if I need to just do 1 and 2* champs or if I should rank some higher ones too.