As you can see, this deck offers a multiple win-conditions:
1) Play Anka, play deathrattle minion on the board, copy the 1 mana deathrattle minion with a Shadow of Death and just mill your opponent, while summoning powerfull taunts, which are healing you.
2) Mill your opponent as normal mill rogue would do.
3) Thief interesting cards and upgrade your heropower to deal basically 3 damage without dealing damage to yourself, which is usefull every time as for a mill deck.
4) Play nzoth and copy him after with Togwaggle Scheme or shadowstep him and play after with Lab Recruiter.
5) Heal with your deathrattle minions and never fatigue!
Basically if you have any improvements or ideas to add, let me know, I would definitely love to do the best deck possible around this playstyle!