Mulligans
General Mulligans
Mulligan is very easy, just take away every high cost to get cards to play at tempo. Witchdoctor and Apprentice are your only pre-3 cards, so you mostly will start on turn 3. Keep lighting storm only versus aggro. You always want Firetree Witchdoctor and Twilight Drake on your starting hand.
I made a guide for this, but it doesnt show…