Can anyone help me power up my Atraxa Superfriends deck?

It would really help if someone could tell me what can be removed and what can be added.

https://moxfield.com/decks/Xug0AZuQ7UCxwRqCp1fN6g

Oh my God, why do I have to write 250 characters? I feel like I'm back in school, forced to write an essay.