This is a very cheap deck which can be used for every ritual archetype. The basic idea was to summon the "Demise, King of Armageddon" ritual monster to break the field and then with the help of "Ruin, Supreme Queen of Oblivion" monster (which can attack 2 times in a row if summoned correctly) to attack with these 2 cards for game. (This was my first approach of this deck: https://ygoprodeck.com/deck/ruin-amp-demise-impcantation-cheap-deck-for-masterduel-6sr-amp-2ur-553030)
But these restrictions makes this strategy a bit of impossible. So my next approach was to bring the "Demise, King of Armageddon" monster and then with "Crealtar, the Impcantation Originator" monster + 2 other Impcantation monsters to hit for 9400 LP.
This might not be that easy to execute as a first turn kill cause of handtraps and other disruptions that can slow the process. This deck contains some small draw engines as Spellbooks and DarkMagicians which can help a lot with cycling through materials and pieces of the combo.
Impcantation Ratios: Most of the times Ritual monsters are way more accessible, cause we use more of them. The main reason for that is that Impcantation ritual spell can be retrieved from grave. So it's smarter to use more of level 3 and level 6 Impcantation monsters to activate them from hand. The level 10 Boss monster can even suffle them back to deck if needed, to never run out of resources.
Cards like "Swords of concealing light" and "Gravity bind" can help with slowing down your opponent, while they can be pretty good targets for "Magicians' Souls" (to send them to grave and draw some cards). "Gravity Bind" might be annoying for you aswell but it can be destroyed in your turn by using the effect of "Demise, King of Armageddon" to remove it from the field. Some other good targets to discard with "Magicians' Souls" are "Rise to full Height", "Lost Wind" and "Galaxy Cyclone".
You can always use even better ritual monsters to end your opponent as Chaos Max Dragon which has some sort of build-in protection. That's why you should look at the side deck for more options.
"Libromancer Firestarter" is a very good starter to defend yourself in turn 1, while it can be protected by the effect of "Demise, King of Armageddon" in turn 3. On the other hand "Lord of the Red" is extremely good, cause he can destroy 2 opponent's cards with his Quick Effects in either player's turn (this card feels like "Baronne de Fleur" on a budget).
I am a bit lazy with the extra deck cause Impcantation non-ritual monsters prevent you from special summoning from the extra deck. But that's not true when you summon "Crealtar, the Impcantation Originator" which negates the effects of all impcantation non-ritual monsters. So you can always extend your combos even further. I just don't feel like I have to do it.