Here's the solution for #11, which again is no pre-turn effects, no Echo of Medivh, opponent face untargetable, opponent has arbitrary cards in hand, nerfed Warsong Commander, and you have at most one copy of each card in hand:
Sorceror's Apprentice (8 mana left)
Ancestral Spirit (7)
Faceless Manipulator (2)
Feign Death (2)
At this point, you have 4 Sorceror's Apprentices in play.
Innervate (4)
Flamewaker (1)
Ancestor's Call -> Archmage Antonidas (1)
Commanding Shout (1)
Fireball -> Archmage Antonidas (1)
Fireball -> Archmage Antonidas (1)
Fireball -> Archmage Antonidas (1)
etc.
Ancestor's Call / 0% RNG contingencies:
If Ancestor's Call summons Mal'ganis (or any other targetable non-deathrattle minion) for your opponent, you can just Fireball it before Fireballing your own minion.
If it summons Dreadsteed, the Flamewaker will still hit your opponent for 1 every time.
If it summons a Sneed's Old Shredder that repeatedly summons Sneed's Old Shredders, then you can Fireball the Shredder repeatedly and the Flamewaker will still hit your opponent for 1 every time.
If it summons a Sylvanas... that may actually be a real issue. Fortunately the solution uses only 9 cards, so you can throw in a Silence too.
If it summons a Majordomo, then technically you can only do 9 damage to your opponent's face in the worst case, so you need Silence here too.