It goes off the power rank of your best unit bro, so just because you've got 9* doesn't mean arena units will be 9* you need to get the power grade of one unit up to get them all 9*, best thing to do is put all components prototypes and wrenches into one unit to reach next power grade
I've got a two gold star unit but all my arena units are 1 and a half stars. Been like that for over a week
It goes off the power rank of your best unit bro, so just because you've got 9* doesn't mean arena units will be 9* you need to get the power grade of one unit up to get them all 9*, best thing to do is put all components prototypes and wrenches into one unit to reach next power grade
@Joshua Butcher awesome cheers bro 🤙