I just checked an idea to improve the win condition of quest rogue.
Add
Fire Fly +
Igneous Elemental to the deck. Because both of them give the same 1 drop minions. Making it easy to complete the quest.
Maybe this is why the quest is OP. But i never tried this deck, i just came across it just now.
I think it greatly improves the chance of completing the quest. But i need to test it to say if its OP for sure.
But the deck i was using before is certainly not overpowered.
EDIT: On the first game i played with the elementals i completed the quest instantly. Ok so this is why the quest is OP. I agree now
EDIT_2: Second game, same thing, completed the quest instantly because of the elementals. Confirmed. This is OP
EDIT_3: Third game instant quest complete because of elementals. LoL