Improvements to (1):
Priest: player 1 turn 3
(vs rogue)
turn 1: play dhawk
turn 2: play mindvision(cold blood), play cold blood, hit for 5x2 (20 left)
turn 3: play mindvision(cold blood), play cold blood, hit for 9x2 (2 left), holy smite
Warlock: player 1 turn 3
turn 1: play dhawk
turn 2: play 2x abusive, hit for 5x2 (20 left)
turn 3: play 2x power overwhelming on dhawk, hit for 9x2+2+2=22
Any (neutral minions only) -- also solves (2): player 2 turn 3
starting hand: 2x dhawk, 2x wisp, coin
turn 1: draw abusive, play coin, 2x dhawk, 2x wisp
turn 2: draw abusive, play 2x abusive, hit for 5x2+1x2+1+1 (16 left)
turn 3: draw and play raid leader, hit for 2x2+2x2+2+2+3+3=18
If we can use Arena rules (more than 2 copies of a card):
Warlock: player 2 turn 2
starting hand: dhawk, 3x power overwhelming, coin
turn 1: draw soulfire, play dhawk
turn 2: draw anything, play coin, 3x power overwhelming, soulfire (26 left), hit for 13x2=26
Rogue: player 2 turn 2
starting hand: dhawk, 3x cold blood, coin
turn 1: draw eviscerate, play dhawk
turn 2: draw prep, play coin, 3x cold blood, prep, eviscerate (26 left), hit for 13x2=26