Steelswarm Deck List

---Monsters---

1x Steelswarm hercules
1x Steelswarm longhorn
2x Steelswarm Caustag
3x Steelswarm Girastag
2x gatekeeper
2x Sentinel
2x Genesoid
3x Scout
3x Cell

Total - 20

---Spells---

1x Monster reborn
1x heavy storm
1x Dark hole
1x Book of moon
3x pot of Duality
3x Double summon
3x First step towards infestation
3x Infestation pandemic infection

Total - 16

---Traps---

1x Solemn judgment
2x Solemn warning
1x corrosive contagion infestation

Total - 4

---Extra---

2x Verz ouroboros
2x Verz Orphion
2x Verz bahamut
2x Verz Thanatos
2x Verz Nightmare
3x Steelswarm roach
2x utopia

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I've tested it and it works well so far.

Note: "Verz" monsters are known as "Evilswarm" on DN

you dont have many traps try adding royal decree instead of solemn it disrupts so many decks and strategies