Most played cards in Rebels:

1 Decks
Squadron Hawk
4 copies - 4 average
Icatian Javelineers
4 copies - 4 average
Amrou Scout
4 copies - 4 average
Ramosian Sergeant
4 copies - 4 average
Bound in Silence
4 copies - 4 average
Defiant Falcon
4 copies - 4 average
Quicksand
3 copies - 3 average
Kor Sanctifiers
3 copies - 3 average
Sunlance
3 copies - 3 average
Aven Riftwatcher
3 copies - 3 average
Veteran Armorer
3 copies - 3 average
Circle of Protection: Red
2 copies - 2 average
Oblivion Ring
2 copies - 2 average
Ramosian Lieutenant
2 copies - 2 average
Journey to Nowhere
2 copies - 2 average
Haunted Fengraf
2 copies - 2 average
Prismatic Strands
2 copies - 2 average
Secluded Steppe
2 copies - 2 average
Thermal Glider
1 copies - 1 average
Zealot il-Vec
1 copies - 1 average