Some additional playtest notes...
One thing that I did throw in against the Thunder Bluff raid was a ton of Arcane Torrent allies. I think this helped us get so far. We were able to turn off the War Stomp effect and bypass protectors this way. Canissa the Shadow, Karina of Silvermoon, Voltrinna, Naliss, Nea Sunmark were in both the Blood Elf decks.
Cheap protectors are a MUST!!! Jazmin Bloodlove is good. I think you need to get out protectors to protect your flags once you have them captured. You must also be able to divert the tough hard damage coming from the minions.
Stealth and Long Range are attributes that we really haven't taken advantage of. Our Rogue player is out of circulation because of a new baby, but this would usually be his role. Find some Stealth allies that can bypass protectors and steal flags. Long Range would be good because it keeps the hitback damage to nil. We don't have a hunter player in our group usually. I think it's because hunters are not that powerful or popular.
I think our regular lineup would wreak havoc on these city raids, so we haven't pulled out our toughest decks. But going against people who haven't put in enough protectors will tilt the scales of favor in the direction of the raid boss. You must have protectors.
Kobradin