I'm just gonna throw mass hysteria into the cloning priest and hit go.
The only way I lose with that deck is that I get rolled by zoo and similar and never even get to scream. Now you have a turn 5 probably board wipe. Seems good enough to make it a very strong deck. No late game deck can beat it, quest rogue doesn't beat it, druid depends on how fast they ramp but still I think it's priest favored. Just hunter, zoo and similar beat it. Odd paladin isn't good enough against it either. It's a legit deck right now.
I haven't really enjoyed playing that deck because it feels so so bad to draw all your big guys. I hate that. Makes it feel high rolly.
Also seems hard to pilot since its winrate it's actually fairly low.