I'm still new to this game that I started 4 days ago and I gotta admit it's awesome, fun and addicting hehe.
As I said in my early post, Fire cards are good against most matchs and can snag some free wins with the starte deck.
Until this guy comes against you:
Fire cards are mostly based on melee direct/sneak attack, even 1 mana card to fill the mana for the battle because effective and deals Thorns to the assasins that usually have 1-2HP
Currently Mylor is sold for around 50$ and rented for 33DEC/day
Good luck in the game!