This deck has good value with Jandice, which is just a really strong 5 drop, especially combined with Shadowstep. However, it has insane potential for burst damage with P2 Pen Flingers and lots of cheap spells. 

It might be worth switching out the cultists for 2 sinister strikes for extra reach, I'm not sure it needs it though.

We have Scabbs in the deck which allows for just incredible tempo plays as it costs -2 mana.

Let me know what you think