You can only buy 2 if you don't mind crafting 2 SR's.
Only Notable 2 Card Combos are Any Dmaid (Preferably Chamber) + Darkness Metal or Noctovision
NS ( Normal Summon ) "Chamber" , Search Tidying ( If you already have it likely go for the Changeover if you have a Spare or Access to a lvl 5 or Higher Dragon or Hospitality for Next Turn ) Link Summon Pisty using the "Chamber" then Either Banish it with Darkness Metal or Chain Noctovision, Use Darkness Metal Effect to SS ( Special Summon ) Chamber then Link Both Cards on Field to Link Summon Hieratic Spheres ( Left Zone ).
Use your Interaction Wisely always summon Nurse off of Spheres to proc Chamber as much as Possible, If you Didn't start with Chamber Set up any of the Transformed Dragonmaids for future Tag Out or Fusions.
Do not be Afraid to do 3+ Card Combos it is very easy to get advantage back with Nurse being resummoned by Sheou and then Grabbing more Hospitalities Via Chamber.
An Average Overextended Combo Will likely End on Hieratic + Pitknight pointing to it and a Chamber Set.
Only Go for Extended Combos if ur starter is Chamber and You already have Tidying or Hospitality
Chamber + Tyding + Nurse + Noctovision or Darkness Metal ( Only go for Fusion turn 1 If you have 2 non Engine and Chamber + Tidying + Lvl 5 or Higher Dragon )
NS Chamber, Search Hospitality , Link Summon Pisty -> Steps of Previos Combo , Hospitality for Nurse, Nurse SS Chamber, Link Summon Pitknight (Left Zone)
This allows for an Extra negate on top on both your Bounces and Possible Tag-Out plays There is an Alternative Combo with Kitchen or Parlor + Hospitality + Noctovision or Darkness Metal But its the same Board without Tyding if you Start with the Fusion I'd Suggest Spheres + Sheou and a Set Tyding which is the best board you can Ask for.
This Deck Isn't made for Linear Super Optimized Combos you play as best you can and reap the rewards from there, If you lose a game cause the deck isn't strong enough it is what it is, Even with a more optimized list with URs This deck will always have a ceiling This is only here for Those that want a Simple Deck that can get them some extra gems before choosing a Tiered or Viable Rogue Deck.
Do The Tutorial, Buy Bundles or This Structure Deck, Do Solo Mode and Duel Strategy Clear out all Bundles and Most importantly make sure whatever deck you decide to play makes you want to strive to continue getting better.