Most played cards in High Tide:

2 Decks
Pact of Negation
8 copies - 4 average
Turnabout
8 copies - 4 average
Merchant Scroll
8 copies - 4 average
Force of Will
8 copies - 4 average
High Tide
8 copies - 4 average
Brainstorm
8 copies - 4 average
Time Spiral
8 copies - 4 average
Preordain
8 copies - 4 average
Ponder
8 copies - 4 average
Force of Negation
7 copies - 3.5 average
Predict
6 copies - 3 average
Cunning Wish
6 copies - 3 average
Dress Down
4 copies - 2 average
Teferi's Realm
4 copies - 2 average
Flusterstorm
3 copies - 1.5 average
Scalding Tarn
3 copies - 1.5 average
Flooded Strand
3 copies - 1.5 average
Snap
2 copies - 1 average
Misty Rainforest
2 copies - 1 average
Intuition
2 copies - 1 average