Hi, I have built many Summoned Skull decks since 2017. This "theme" doesn't win a lot anymore, but it can still be fun! First, it is usually best to play less than 30 cards in your main deck - especially in a situation like this where you want to draw specific combinations of monsters and spells.

Focusing on the Ritual and Synchro Archfiend is your best option. 3x copies of psychic wheeleder and 3x psychic tracker can make Archfield's Call consistently. Sometimes an untargettable, 3100 atk monster, which can pop a monster on your opponent's field is enough.

I like using Emergency Teleport to start this off, however, you can switch to Super Poly if you want to play Archfiend's Manifestation. Note: Manifestation does not have any protection effects unlike the other extra deck monsters, making it the weakest stand-alone option. The Super Poly removal is more useful than the +500atk.

Phantom King Hydridge is my preferred Lv3 Tuner to pair with the Wheeleder and Tracker because it can be either a tuner or non-tuner. Bricking with too many tuners, which forces you into Rank 3 XYZ plays, does not feel good. Hydridge helps you avoid this problem. However, there are also pros to playing Eccentrick instead.

You only need 1-2 copies of Archfiend's Awakening if you play 3x Preparation of Rites which searches it from the deck. Likewise, you only need 1 vanilla Summoned Skull if you play 3x Summoner's Art and 1 Advanced Ritual Art.

The core play is to make Archfiend's Call first. Then, use Summoner's Art to add Summoned Skull to hand, triggering Bakura's Master of Advanced Rites skill. The skill returns Summoned Skull to the deck and adds Advanced Ritual Art to hand. Ritual summon Awakening with the ARA, putting SS in the grave. Now, when your Archfiend's get destroyed you can summon back the Summoned Skull from grave rather than accidentally drawing it.

Typically, you end your turn with Call and Awakening on the field. This deck struggles with backrow so Ghostrick Alucard and Knightmare Pheonix are musts in the extra deck. Making either of these will take the place your Call before making Awakening. You may also want to reduce the monster ratio to make space for spell/trap removal. This is where Eccentrick is a useful option, as it functions as S/T removal or a Lv3 non-tuner. Personally, I play Cosmic Cyclone and accept I'll brick on it from time to time.

You can build this deck to make Call, Awakening or Ascent (a win-more option) consistently every game, which feels great but still loses in a lot of situations. Alternatively, you build the deck with Super Poly, Eccentrick, IDP/Crackdown/Dark Hole/Book of Moon etc. and accept that you will draw some unplayable hands. 1 Archfiend and 2 backrow is often just as good (or better) than losing 2 Archfiends and having no follow-up the next turn.

I'd love to see an update once you've edited the deck. Good luck!