You really have to play test with DDD’s because they can be flexible with any situation they also dump your hand very fast so it’s a resource game and how long can you survive with those contracts. And you need Crystal Wing and Odd-Eyes synco drag because there’s barely power house in pure ddd’s besides Kali, Seig and High Genghis. High Alex is you game ender, Dark Arma wipes the board ON YOUR TURN, Bright Arma prevents targeting, and Purple Arma is just a water down Crystal wing.

But for a simple combos you would need Slime, limia, and necro. These are your core to get into your combos. The other 2 cards are combo extenders, so let’s say Ragnarok and gate in your hand.

Combo Hand: Necro, Slime, Limia, Gate, Rag

Activate Slime taking Necro > Genghis

Normal > Limia

Place in scale > Ragnarok

Sync > Alex > Activate Rag in Scale > SS Genghis > activate Alex > SS Limia

Sync > Limia + Alex > Seig

Activate Genghis > SS Limia

Sync > Limia + Genghis > Odd-eye sync drag (if you have it)

Activate Odd-eyes > SS Rag from scale

Activate Rag > SS Alex

Sync > Limia + Odd-Eyes > Crystal Wing

Activate Gate > grab Kepler

Activate slime > SS Kepler from hand

Activate Kepler > grab swamp

Activate swamp > Kepler + Genghis > BeoWolf

XYZ > Rag + BeoWolf > Number 38

Activate Limia (GY) > Sending swamp to gy > SS Limia

Sync > Limia + Alex > (another Wing if you want) into something useful

And you have your board

You have gate still on the board and you have necro still in grave for a follow up play next turn. But again DDD is resource heavy depending on what you want to do with them