CCC is both one of the most open leagues and also one of the most subtly competitive
Example decklist available here: Red Hulk Aggro The Unbeatable Squirrel Girl (Green) Krenko, Squirrel Boss
Adventurer's Inn Balamb Garden, SeeD Academy Baron, Airship Kingdom Capital City Clive's Hideaway Crossroads Village Eden, Seat of the Sanctum Gohn, Town of Ruin Gongaga, Reactor Town Guadosalam, Farplane Gateway Insomnia, Crown City Ishgard, the Holy See Jidoor, Aristocratic Capital Lindblum, Industrial Regency Midgar, City of Mako Rabanastre, Royal City Sharlayan, Nation of Scholars Starting Town The Gold Saucer Treno, Dark City Vector, Imperial Capital Windurst, Federation Center Zanarkand, Ancient Metropolis
I expect to board Syncopate in and out a lot in this archetype, as its effectiveness should vary greatly by matchup