What is one offense that is super strong but takes a while to get rolling? Some dominant strategies are not used because they take to long to get rolling i.e. White ignore/Witness to Creation. Most defenses can not hold out long enough or start slacking once the offense gets going. I was thinking sites/Burial Shrouds/Besieging the City. Playing 5 BtC's 3 Shroud's with sites can make it to where an offense can never really attack. Of course gold can hold its own without these cards so it might make a nasty defense. But If I used this defense and could use Witnesses to Creationx5 or some sort of other slow yet strong offense that is a guaranteed rescue, it might be a very competitive, fun deck.
There is many other offenses that can be used such as; Built on the Rock, Gathering of Angels, strategies with Training in Righteousness, placing enhs on heroes prior to battle, hand d/c and deck d/c, as well as converts/stonewall type offenses that kill all the EC's in territory, and Sowing the Seed. Those are a lot of different strategies that do not make it to the top table in tournaments usually because either it is played wrong or the defense can not hold up long enough for the combo to come out.
One more thought. Many people have created these combos but used search/draw cards in order to pull it out quicker. But if you're opponent it just sitting there due to B Shrouds and Besieging the City or lockout, you can just use cards for a combo and not filler cards that get out a smaller combo.
Let me know what you think and if I should playtest this or just leave it as an idea.