Honestly the extra deck is unfinished, but you won't get too many opportunities to access them anyway because Impcantation locks you out of it. there are plenty of ways to clear your own Impcantation cards like having a bewd in hand and tributing but the goal is chaos dragons regardless. Crealtar also helps with giving your impcantation cards some damage if you didn't summon them in defense AND unlocks your extra deck by negating the impcantation cards but not the ritual ones.
I would say the 5 most replaceable cards in this deck would probably have to be Raigeki, Harpie's, Solemn, Skill drain, and Return of the Dragon lords. They're really only there because of my experience with specific players, I encourage you to swap these out with stuff that suits your playstyle and or builds upon the chaos archetype.
Biggest weakness would definitely have to be the inability to clear the board or negate stuff in general, I used to have ash blossom but I think I can get away with skill drain more with more effect. I found that with most problematic cards, regular chaos dragon would just flip it and the problem was solved.
I see too many chaos max dragon profiles exclude Blue-Eyes Chaos Dragon (the 3000 one) and I don't get why, its so easy to summon both and guarantee you OTK on 2nd turn if the opponent can't negate you and they have at minimum 2 monsters on the field.
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