The non-archetype Spell/Traps really depend on the meta this deck is intended to play
And like all of the other boss monster upgrades, Scarlight Red Dragon Archfiend beats the original in every way, shape & form

Jam Dragon Drive (Alternative Artwork) LPST-JP021 Divine Arsenal AA-Zeus Sky Thunder (Alternative Artwork) LPST-JP022 Traptrix Sera (Alternative Artwork) LPST-JP023 I:P Masquerena (Alternative Artwork) LPST-JP024 Cross-Sheep (Alternative Artwork) LPST-JP025 Promethean Princess, Bestower of Flames (Alternative Artwork) LPST-JP026 Monster Reborn (Alternative Artwork) LPST-JP027 Swords of Revealing Light (Alternative Artwork) LPST-JP028 Raigeki (Alternative Artwork) LPST-JP029 Scapegoat (Alternative Artwork) LPST-JP030 Mystical Space Typhoon (Alternative Artwork) LPST-JP031 Reinforcement of the Army (Alternative Artwork) LPST-JP032 Pot of Avarice (Alternative Artwork) LPST-JP033 Forbidden Chalice (Alternative Artwork) LPST-JP034 Fossil Dig (Alternative Artwork) LPST-JP035 Called by the Grave (Alternative Artwork) LPST-JP036 Crossout Designator (Alternative Artwork) LPST-JP037 Fateful Adventure (Alternative Artwork) LPST-JP038 Purrely Pretty Memory (Alternative Artwork) LPST-JP039 New Frontier (Alternative Artwork) LPST-JP040 Stand Up Centur-Ion

Then each opponent who didn't sacrifice a creature discards two cards
Gameciel, the Sea Turtle Kaiju X WATER Level 8 [ Aqua / Effect ] ATK 2200 DEF 3000 You can Special Summon this card (from your hand) to your opponent's field in Attack Position, by Tributing 1 monster they control
I imagine the math is for blockers attitude pairs up pretty nicely with Fiery Emancipation and any other effects you have in the deck, as going over 40 seems like childs play