Made my own Rogue quest list:
Rogue - Deckbuilder - HearthPwn
Similar to the one on reddit, but i didn't like some of the choices he made. Sergeant sally is a stupid include, it wipes your whole board when killed after N'zoth. So I went with more draw instead, as assembling the combo pieces is your main concern, after that it's just plop down a couple 5/5s every turn.
There are many easy ways to activate the quest with this deck, you just need 4 flame elementals from either Igneous Elemental or Fire Fly.
Ideal hand, and this isnt even that rare, is to start with 2 igneous elementals. T1 quest, T2 coin+igneous, T3 igneous and turn 4 activate quest.
2 Fire Flies + 2 shadowsteps. 1 igneous, 1 Fire Fly, 1 shadowstep.
Mimic pod into Igneous, shadowcaster on an igneous, Spirit Singer + barnes getting an igneous works because Spiritsinger is on summon deathrattle, not play.
Xaril can give you another bounce. Tol'vir is in the deck because he can be played right after your igneous to protect it until shadowcaster, can also protect you from early aggro.