Display of Honor is probably the most valuable card. Abuse of it wisely. This is my personal priority of its functions:
1 - Draw 2 weapons
2 - Goat
3 - Lifesteal +4+4
+
Navani, Warsinger works pretty well when played on turn 4. It's a good target for the opponent to worry about while you focus on setting up your arsenal.
+
Icaria always gets the power she needs!
+ I strongly advise to
play on low life. Just take the hits, draw cards, buff weapons. Drop your life to 10-5HP if you dare and know the decks you're playing against. Clear the board and end the game with your infinite weapon supply that not only will deal massive damage but also will shield your low HP for weeks.
Most of the games my opponents use all their options while i'm
swimming in weapons and replacing them just for giggles, harsh rulling for no reason, torching my units/myself and not attacking at all while making them quit. That's about it.
But not all is giggling and laughing. If for some reason you don't draw harsh rule and you can't clear the board fast enough, I think you're done. Other than that, you will feel godly all the time.