four emperors booster box One Piece OP-09 Japanese - Official One Piece TCG Booster Box | One Piece Trading Cards One Piece TCG: Four Emperors

Its probably above average on the power scale, but not one of the top decks in my meta

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This means I had to dig to find a lot of staple effects ramp, removal, and card draw on Legendary cards, most of which are permanents because there are barely any Instants or Sorceries

I agree but there is more than one path to do so

You could even add things like Parallel Lives, Anointed Procession, or Doubling Season if you have the budget for them