I think you have too less damage with Corvus. The other cards have low damage too, so I would use
Kephren, Falkenstein, Jay, Sandro, Plunk, Chiara, Sasha, Redra.
You can try putting in a 5* like Minerva or Michael.
Michael, Falkenstein, Kephren, Sandro, Chiara, Sasha, Redra and another 2* You can try Spiaghi but I don't think that is smart when you have 3 support cards.
"Kephren, Falkenstein, Jay, Sandro, Plunk, Chiara, Sasha, Redra."
Yes. This is the standard mono Skeelz deck that would be the best option. Maybe Manfred for Jay as i said before, but it really depends on personal taste i guess.
For 5* i think Michael really is the best option (i am yet to make a deck with him, good card).
Kephren Falkenstein Jay/Belgosi Sandro Plunk Chiara Cr Sasha Redra, that's the standard deck for Skeelz. Skeelz are mostly a 3 round win team as they can't create a big enough gap really as you really only get 4 - 5 damage cards most of the time.
If you want to incorporate Michael either do Michael for one of the 4* then another 4* to Andy Ld/Praxie or
Michael for Jay then 3* to Liam. Plunk's pretty beast so I'd prefer him over Sandro but not over Chiara Cr personally.