Roster Advice Needed

Zirich

So ive been at a near stand still for quite awhile now and am looking for some input on my roster. Scaling seems to prevent me from getting anywhere.

I have 6 5* with a couple covers each at lvl 255

My next highest are a fully covered x-force wolv at lvl 236 and Nick Fury at 11/13 at 229. From there it's just about all off the 3* characters championed. I have most of the 4* lineup in various states but not usable.

Thanks for any help provided.