Round 1 - Use immortals + sorceress combo / siege engines (to thin also), and any bronzes it takes. Its important to win round 1 and if possible go for a long round 3 (dry pass round 2).

Round 3 - We want to get Gerhart down as soon as possible, so play defender and gerhart asap. Use sheilds on them if you need to. On your 2nd to last turn play Tissia, use Gerhart for hopefully a scorch (patience 11) or Curse of corruption, or any spell that best fits depending on your opponent. Last turn, re-use Gerhart's order for another spell and play Viraxis: King to refresh Gerhart, and create another spell!

Open to improvements!

Enjoy