This is my ridiculous fast PvP team:
Hero - Deathknight with purple weapon
This build can potentially win against most teams on turn 1, the ideal scenario goes like this:
1. Elspeth is empowered, use her on hero. This almost always fills Sacrifice and gives you another turn, plus the whole enemy team is death marked
2. Use Sacrifice, and pick whichever of Draks color is most prevelant. With the whole enemy team death marked, sacrifice will boost Draks damage to ~40. Sacrifice is refilled and had another 4-match.
3. Use Sacrifice again, Draks damage is now over 60. Drak is probably ready, Sacrifice is ready again and again had a 4-match
4. Either use Drak to kill entire enemy team, or use Sacrifice to boost drak above 80 damage
Note: If you want a high win rate, don't choose this team. Also don't use this against impervious teams. This team is a Glass Cannon for super fast PvP. It feels like 20% of the time this team wins on turn 1-2, 20% of the time you fizzle and resign, the rest of the games are usually over within 8 turns.