Do I level four or five,stars

Spicyslicer

I have some greet four stars. The only five,stars I have hawk eye and gambit. Those five stars are pretty good however. I have some pretty wicked four star characters. Is it safer or better for me to level the four star characters or should I concentrate on the fives only. Now,hat six is,coming...

winterthur

4* are still very suitable for current content. When 6* comes about, you may be able to get the resources to rank the champs because you are clearing current content.

Vision_41

Level up who you think is best. I'd try to get my highest one. For example, my first highest then 2nd, etc.