(All elements should be able to build good rush decks and good control decks)
I was thinking that elements that specialize in rushes should have more efficient rush cards and less efficient control cards while elements specialized in control should have more efficient control cards and less efficient rush cards.
All elements should have rush cards and control cards but not all quanta is equal when spent toward a type of card.
I think maybe 3X with a cost of 2|1
would be sufficient to make it fit with water's specialization being more control than rush.