On android is very easy to win because the plant players don't know how to do a plant deck, on iOS is almost impossible to win as a zombie player because the plant players have good decks.
I have all legendary cards x4 on both sides, on iOS I only win 3/10 with my best zombie decks on level 50; as a plant player I win 9/10 on level 50. (Sometimes I win 10/10) I have 35 stars after level 50, it was very easy with a plant deck.
=P Play as a plant heroe. This season is very easy to win with a bean deck (include 4 clique peas xD)