Produce a total of 8 tokens, including saprolings or octopi, to meet the objectives. Keep some removal and creatures in reserve, since the AI can clear the board with either Slaughter the Strong, or Settle the Wreckage.
Kill your own creatures with Turn to Frog if necessary to meet the lose 4 creatures objective. The objectives also require casting 3 creatures (Radha or Trostani).
Beware of the Gateway's ult, which will kill you if the AI has the City's Blessing. Win quickly, and cast 4 creatures to achieve all objectives. Prioritise getting a Sunbird in play, then casting spells. Try to avoid Cyclops in the first creature slot, as its power can be set to 0 by the AI's Thaumatic Compass/Spires of Orazca.