Though our very Commander is a damage amplifier, her effect is gleefully multiplied with each additional amplifier on the table, so we include cards like City on Fire, Furnace of Rath, Fiery Emancipation, Fire Servant, and Dictate of the Twin Gods for extra Scoville units
I dunno, other than playing Bounce Lands, your deck looks fine
With a uniquely rare ability to completely shut down your opponents during your turn, Myrel stops all sorts of combat tricks from happening, giving you the freedom to safely cast your spells and attack into an open board
It's also a nasty one to upgrade with untap effects that let you reuse Stella's ability again and again
If you cant get Kona through in combat, try to tap it down with Springleaf Drum or Jaspera Sentinel, or crew up a vehicle