To get the tail feathers ripped out like that, I would suspect something got after him like a Fox, Coyote or Dog. I don't think another rooster would be able to do that.
I'd continue to treat the wounds/scabs with ointment, keep the area clean.
Ivermectin will treat mites and perhaps...
Is there a way you can get some clear, well lit photos?
How did he lose the feathers, do you know?
Is he with the flock or have you separated him out?
Hard to see what's going on there. General care is to clean the area and any wounds with saline, Chlorhexidine, Povidone Iodine or similar...