Hearthpwn

This is a aggro druid list i used to get from rank 15-Legend this season

The matchups is quite good since you prey on the tempo rogues,shaman and hunters on ladder while still having a good winrate against mages and other druids, the bad matchups you have is Priest ( for some reason they always have the perfect board clears answer) being 30-70 in their favor and Warlock having a 40-60 Winrate, i got a 63% Winrate with this deck to legend

What make this deck very good on the current meta is the crazy alchemist tech that is very good against doomsayers and shaman totems while having the upside of getting you crypt lord and druid of the sward get a huge atack and help you deal that extra damage, that flexibility is just way too good for this deck and most of the time you will have won the game by turn 5

For the Mulligan always go for Crawlers against Shaman, Rogue, Hunter,Warrior and Warlock and against the other classes go for 1 drops and try to get as many minions on the board as possible