Last puzzle island basically gave unlimited maze coins, assuming you can afford the moves, but they were expensive ratio wise and only gave 1000 coins per 4 tiles...I think it was food, gold, habitat tokens, then 1000 coins after the first offerings if 2k, 3k, 5k.
I might go easy on the puzzle event too unless the mythic has a primal element to complete my team. I already have three 3 star mythics but no primal. Or maybe if the legend orbs they'll give away will be good to get any of my current dragons to 4 or 5 stars. What i didn't like about the last puzzle event was the dragon rescue wasted a lot of the moves because we had to waste moves to get keys, which meant less essences and orbs from the middle section. At least we don't have to worry about that this time.