Hearthpwn

Taunt or Pirate. I would mulligan for pirate first. Look for cheap AoEs, weapons, taunts (Tar Creeper would be better), and Devolve is a good option too. All in all you have many tools to shut down the opponent's aggression. Only the mulligan and the cards you draw later on can be your enemy - if you end up with high cost minions. This goes for all the different MUs too.

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Taunt W however will be very tricky. They can get ahead of you pretty easy, because they have better removals and a win-condition. If you somehow get Devolve, Hex and Volcano, they will help you a lot later on. But at the same time you mustn't forget, that you are not facing old school control warrior, aka a deck filled with answers. Taunt warrior has them, but their deck is diluted with taunts, so setting up a Spirit Echo turn won't be impossible to do.


The strategy - The word we are looking for is "pressure". Try to threaten them, so that you can bait out many of their removals, for example Brawl, and at the same time preserve your strongest minions as much as possible. You have to make them spend their resources just to desperately control the board. If they do that, use Devolve, Volcano or Bloodmage Thalnos + AoE to punish them. Normally I use Hex on the Primordial Drakes, whereas Devolve mainly against a big board, containing at least Direhorn Hatchling and/or Alley Armorsmiths.


But keep in mind, we also need the minions to win, so at the beginning of the match just throw some Tar Creepers and try to set up a Spirit Echo turn. 
Aya Blackpaw is essentially important in this MU, because the Jades help by flooding the board and she leaves you with a token after a board clear. That's why Spirit Echo should mark her!!! Very advisable, if you also get ticks on other value minions (Servant of Kalimos, Blazecaller, Jinyu Waterspeaker etc).


Against TW the strategy is not as straightforward as to try to survive an aggro attack with bunch of heals/taunts/AoEs, but the game still winnable with the right cards. Overall with the heal options and the totem summoning HP, you will survive another fireball. The little tokens from Invocation of Earth can distract it too.

Aggro or mid-range. Either way I would mulligan for cheap AoEs, weapon, taunts and especially Devolve. If you get the Hex as an option - keep it. Use it for the hungry hyena, or for highmane.

Control, Midrange control/aggro or pure aggro Murlocs. Mulligan for cheap AoEs and most importantly Devolve. Use it on a buffed board with murlocs or when a minion has the Spikeridged Steed buff. If you have those two things, then it's advisable to search for either cheap taunts or Jade Lightning. Normally, if you hold your position on the board, then you can hold onto the removals too, so that you can get bigger value from them, but don't be too much greedy, respect your health total.


Normally I cast Devolve, when on turn 3 my opponent plays Murloc Warleader (and there are bunch of murlocs duh), but if there are many of them and still no sigh of the Warleader, then kill the inner synergy, because it will be time for Gentle Megasaur! 

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Against control - the things mentioned above will also help. What should I also mention? - use your resources wisely. Don't throw everything on the board just for them to die to Equality. The more things you mark with Spirit Echo, the better. Again Aya Blackpaw is the most important target.


While we gain value, try to also deny theirs. Because we have Devolve and Hex, we can narrow down the summoned threats from N'Zoth, the Corruptor. That's why you should save your biggest removals for their scariest minions. We have more of them than our opponent, so the strategy here is really gaining card advantage. Keep in mind, that they can also gain additional value with Stonehill Defender and Hydrologist.

QR or Miracle. Because of the Nerf, quest rogue will see little or no play, and thus only Miracle will stay. That's why I would mulligan for MR first, but about that later. Back to QR - in this deck our anti-aggro tools dilute it and you will have a hard time finding the minions to establish a board and to apply pressure. Regardless, if you find something to play on curve, you will be in a better shape. Just don't forget they still have Vanish and you will have to establish the board again. Don't use the hero power or you will mill yourself.

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Against miracle - well, you have to understand, that they have a limited number of threats. 2x Arcane Giant, Edwin VanCleef, Sherazin, Corpse Flower and maybe Leeroy Jenkins and Elise the Trailblazer. Gadgetzan Auctioneer is the most annoying minion you have to deal with. That's why you have to plan which removals go where. Regarding the mulligan I try to find ways to build a board, as this way I will have a better time dealing with their minions - card draw, cheap taunts and a Devolve just in case for a surprise 14/14 edwin.


The strategy - killing their threats and stabilizing or just making a threatening board, which they can't deal with.

Who will win? Spirit Echo or Devolve? That's why you should cast Spirit Echo - after they used a Devolve or when you are going to trade your minion for theirs.


Anyway:


control(Nzoth), jade, the evolve deck, elemental or Murlocs - I would go for cheap AoEs!, weapon, and probably Bloodmage Thalnos. It would be nice, if you eventually get Volcano for their turn 6: Doppelgangster + Evolve.

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When facing control and jade/ele - just use your resources wisely. Deny them from flooding the board, but don't throw away your tools for nothing. Same with Paladin, they will also try to out-value us, but that's why you have to "kill" (aka transform) their key cards. Regarding the mulligan - it's the same. AoE and taunts can stall us the game, when we can unleash our threats.



! Note: Normally shaman decks run at least 1 copy of Bloodlust. Just make the math and consider when it's the time for an AoE.

Note 2: About elemental shaman decks - it's good to know how to read their hand. It's easy to find out, whether they want to activate an elemental and if this is the case, try to break the chain, so that you will make their turns awkwardly (before I ran Doomsayer and this was an option).

Token. Before I continue, I want to say, that this deck has almost no chances against the Jade dudu. That's why my advice is concentrate on the MU, where you have the possibility to win, where the situation is not a lost cause. So mulligan for Lightning Storm, Tar Creeper and again Devolve. Because they have an exploding start - you have to destroy their board as fast as possible. Devolve on their Living Mana will completely shut them down. Volcano or Hex on their Bittertide Hydra. Jade Lightning for their Vicious Fledgling, if this is the only card on the board.

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Jade Dudu: You might face it pretty often;  If you think, that you will most definitely encounter jade, then mulligan for on curve minions. This means Jade Spirit, Aya Blackpaw, card draw. Still, some strategies:

Make a big board ASAP. This won't be easy, as our deck is filled with cheap removals, but if you get lucky with the card draw, then you could possibly do it. They won't kill out threats that easily, so Spirit Echo should hit more minions as much as possible. Flametongue Totem helps us boosting the damage from the weak tokens.

If you happen to find one - in most of the cases you will face zoo. That's why you should mulligan for Lightning Storm, Tar Creeper and the weapon. Zoo is only strong, when there are minions on the board. The two Doomguards won't be that scary - especially if you get taunts later on. 

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But then again, because the class is not present in this meta, you could also encounter meme or highlander decks. If you face a warlock in one of the "save points" (ranks 15, 10, 5 or in the legend ranks), then most likely that's the case.

Quest/Discover/Freeze mages and Secret mage. The reason I'm dividing them that way, is because this deck mostly does well against the second kind. When facing secret mage use cheap taunts early on. They also use Counterspell, so throw away cheap spells or such, which you won't use and then go for the board clear/removal. Fire Fly or Jade Spirit for their Mirror Entity. When they run out of steam, you can make a comeback - after all you have many ways to stabilize.

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Against Discover and Freeze mages - the win-condition is undoing the burst and at the same time doing pressure.  As for the Mulligan - cheap minions, card draw, maybe Devolve for their Mana Wyrm. Just like with the Miracle Rogues, if we manage to keep most of our board, then we will be in a better shape (doing face damage or dealing with their Medivh, the Guardian and Alexstrasza). Use Spirit Echo on the heals, so that you will undo the burst.


- against freeze: don't use the hero power. Very often they won't kill our board, they will only freeze it, and the spaces for our heals are limited.

Purify or Dragon. Try to find a Devolve, Hex and Volcano. Keep in mind, that you have to use your resources wisely. Try to count how much they can buff their minions (with Divine Spirit and Inner Fire) and consider whether or not it's time for a Devolve or a Hex. If they skip a turn, because probably their hand is filled with buffs, establish a board, so that it can threaten future minions or pressure the face. Just don't overcommit, as you will risk it to Dragonfire Potion.

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About Dragon and Control Priest: Those decks have ability to out-value you pretty quick. But still, use your resources to kill most of their minions. Our win-condition now changed to using Spirit Echo, aka keep the pressure going. Also consider, that they can steal it or Devolve too with Drakonid Operative, so be careful.

Inb4 they can't remove big minions that easily, that's why you shouldn't throw everything on the board to die to Dragonfire Potion; my advice is use the strong minions one by one. They don't have infinite Shadow Word: Deaths. 

Note: Just like in the tips versus mage you mustn't use the hero power in many cases, you will only hinder yourself. The most common case is when on turn 1 the priest plays Northshire Cleric and you play a totem, so that they could heal and get a card. If you have a board and a 6 health minion(s), know, that if you use the Hero Power, there is a 50% chance to screw yourself. The bad scenarios are with the 1/1 totem, which will get Potion of Madness-ed into your 6 health minion, or the Spell power totem, which together with Dragonfire Potion will do 6 damage to your board.

-  Jade Spirit - If we had another 4 mana elemental, I would have go with that one instead. It's very weak, when, played on curve, it summons a plain 1/1 token and your opponent has a threatening board (it is acceptable with a 2/2 or a 3/3 jade). Because of this issue, I got an inspiration from StrifeCro's videos to put back the Flametongue Totems again. But since I don't like to top-deck a 1/2 minion in the late game, I'm running only 1 copy of Fire Fly.


- Tar Creeper - As we all know, this is the best cheap taunt in standard. And the reason why I'm not running Stonehill Defender instead, is that Tar Creeper handles aggro better. Because it has 3 Attack on the opponent's turn, it can deal more damage to their minions. And since it has 5 health, it will absorb more hits and thus it will kill more stuff.


If you want a more minion based deck, still using the jades and the elementals, then I suggest looking at my other deck.