Trying out cubic with the new synchron support, can genuinely make some decent boards, assault or rev synchron help to establish some board presence. cubic causality can actually be a pretty solid trap, blanking an effect or two if you need an incentive to play more cubic cards, making crimson nova more consistent.
Goal is to loop unification through duza and foolish burial goods and synchro climb. different levels of the cubics can be cheated out for free for different level synchros. The deck can still fairly reliably get crimson nova out for an otk.
Standard 2 card combo is duza + assault into coral dragon, duza replaces itself to make baronne, coral draws and duza foolishes another spell/trap, usually for extension or utility. duza + rev translates into a crystal wing.
Adding extra cubic cards can help to get crimson nova out but you sacrifice the ceiling and utility of synchron/ therion. Could side in to more cubic cards if going second and play a smokescreen strategy alongside traditional going second otk staples.
recently cut accel synchron and jet synchron, added dweller for GY hate or if you draw regulus you have another option.