Mulligans
General Mulligans
It's tricky to mulligan with this deck as it's very match up dependant, however in saying that you generally want these cards because they put minions on the board while giving a little extra value. Black cat/ Babbling book/ Tour Guide feel like keeps in most matchups.Aggro Mulligans
This deck is very under-tooled when it comes to aggro matchups, I opted for a more late game version of odd mage (Elysiana kinda of gives that away), however in saying that it's not impossible to win aggressive decks because your hero power can hard carry while you try to fight for board, then you can use your board clears, which is why i keep blast wave sometimes.
I’d sub out either one astromancer or stonehill for cinderstorm, that way you have a little more help against aggro