Keep/Feed
So I'm trying to 6* Uugo then Doompriest. My question is out of my roster (excluding the first 5) which should I keep? I am running out of low level to feed. I've heard not to feed epic or higher but are any rares/epics etc that aren't worth keeping?
Which should I have as my top 5?
Also, is it worth fusing? I did it once for Relickeeper but it's such a hassle lol