Dark World are so overhyped, a good deck yes but even with further support they will always be Tier 2 max.
They just aren't consistent enough against other top tier decks.
Maybe in tcg or ogc. But in duel links until faster deck comes out dw will top.
3 dealings 3 ceruli 3 snow 2-3 reignthats game you can almost promise a 2 turn win.
Especially if you add drag down. To ensure no sphere kuriboh in hand.