I've also been experimenting with dragon shaman. I have always played shaman but with how meh they have been lately I was looking for something that would work without being overly aggro. I don't like mech shaman =/ http://i.imgur.com/hguH2mi.jpg (nerfarian is the last card not shown). A couple hours ago I was 400ish legendary, not sure if it has decayed any. Some misc notes:
1) The Abusives are a bit of a blast from the past but they are very flexible and help deal with early game from Hunter/Zoo/Mage. They are not bad for trying to take out Loatheb/Emperor Thaurissan when I do not have Rend Blackhand in hand. Outside of those uses I have found myself using them to trade up or keeping them to buff up Alakir/Whirling Zap-o-matic .
2) Although the deck only runs four dragons I generally do ok and rarely find myself waiting for a dragon. I used to run only three dragons but found myself often waiting for them with a hand full of dragon synergy cards so I replaced my Fireguard with a Twilight drake. Generally I either get my early game stuff (zombie chow/haunted creeper/etc) and keep twilight drake in hand or I have a dead hand and play drake for a 4/6ish. Keeping in mind what classes would mostly likely have silence when deciding to play. Also very fun vs priest :D. If you find yourself without another dragon for so long that twilight drake doesn't feel worthwhile I generally wait until after Chromaggus where I am gaining two cards per turn. Gives it a bit more value.
3) Rend Blackhand is really awesome tech. Taking out Loatheb/Emperor Thaurissan/Dr Boom/sometimes Rag. It is just a shame that it is for the most part a dead card vs hunter. Can we make highmane legendary? <_<
4) Blackwing corruptor into fire elemental is amazing. That is where I find myself getting the huge tempo swing.
5) Most of the one-ofs are put in to be threats. If you see whirling zap o matic played you basically have to take it down asap unless you have something like annoy-o-tron or other taunt. Unbound elemental is also threatening because my opponent has no idea that I am not running overload besides lightning storm. Azure drake was put in so I can lightning storm grim patron warrior. Sort of stuck with me though, it is nice. Considered adding another azure drake but not sure what to cut.
Also very open to comments. I've been thinking about adding one antique healbot but not sure.
