Mulligan for elementals, fanatics, village elders, and iona's smiles in that order of priority.
Rush to 8 deserts with elementals and deserts every turn. Build lands defensively. With the help of windborne champions, fanatics, and flashwind you can grab an aggressive land even from afar.
Iona's smile draws your champions, whales, elementals, and Radiance. Shaytan assassin+desert twister and last nightmare can clear whales or big green creatures. You can also use Doomsday against multiple whales or a board filled with frog spam. Finish with whales, champions, and Radiance.
(Replace Steamforge Enforcer with OPWhaleOP)