This one should be 3RW, 4/2, Haste, Flying, and "1(W/R)(W/R): Fate Testarossa, Scythe Loli gains Double Strike until end of turn."
That won't put your opponent at 10 life only 4 turns into the game, but retains the ability to hit really hard and can still put your opponent at 8 life on the 6th turn.