You can replace Altar of Dagon with Pharaoh's Throne Room. Offers better protection for your characters and doesn't take up a valuable artifact slot. You can afford to lose Plagued with Diseases as well.
You can only have one Israelite Archer. Replace one with either Benaiah or Ira (Kings version).
Mentor, Prince Jonathan, Joab, and Armorbearer won't be of much use in a WC banding deck. Replace one with Ira/Benaiah (the one that didn't replace Archer) and add in Maharai (K) and three more offensive cards. If you keep Tribal Elder, you could go Jacob/Captain (W/K)/TSA (K), but I personally like to bump up the Red with The Lord Fights For You, David's Mighty Men, and A Soldier's Prayer. You need a way to combat 12FG with only Angel of the Lord; DMM can do this twice CBN with ASP. The Lord Fights For You is a great card to be using when you are pounding away with your large WC FBTN bands, plus you only have one evil brigade on defense.
For defense, I would replace Artifacts Destroyed and Denial of Christ with Wonders Forgotten and Evil Spirit (K), as they are CBN battle winners.
