What do you need :

1. Adventurer Outfit fully transmuted (or at least the special property)
2. Ambrosia and Vampire Blood
3. Scoundrel for the HP/hit and the frost AOE effect
4. Hellfire for the fire AOE and high dmg
5. Blink and Berserk Aura for the speed, crit and increased dmg effects
6. Wicked Swashbuckler (3 points)
7. Wicked Death (1 point)
8. Wicked Seer (0 points)
9. Wicked Wildcard (8 points)
10. Wicked Wildcard (8 points)
11. Devil (4 points)

Cards bonuses :

1. 3 x Speed (fully transmuted) [Speed : movement and attack speed are increased by 33%]
2. 2 x -X% duration of the negative conditions (fully transmuted) [self explaining]
3. 1 x Focus [Focus : Critical chance is increased by 20%]

You can change the Death with Oak if you would prefer more sustain from the 100% Vampire Blood.

Explaining the build :

The Speed buff stacks but only for the amount of time, not the amount of speed too. So basically 7x3=21 seconds of speed on a 20 seconds cooldown trigger.

The lower duration of negative effects stacks only 2 times. So that means 2x37= -74% duration of the negative effects.

The Focus buff is simply the best buff from those left. The reason why I chose Focus over Brutality is because just as Speed, Brutality stacks only the duration, not the buff itself. And The Devil will drop you constantly Brutality Orbs. A new Brutality Orb will be dropped after 1-2 seconds the buff wears off. And since the build is not crit oriented Cripple or Bleeding are not very good.

Conclusions :

Overall I think the build has a pretty high damage, good AOE dmg and effects with Rapier's passive of Frost and lake of fire from Hammer's Smash, sustain from the Vampire Blood by 50% lifesteal and 20% lifesteal from Smash, 80 HP on hit from the Rapier and pretty good overall buffs. Brutality from The Devil which increases the dmg with 50%, Speed which gives attack and move speed and stacks with Quickness from The Swishbuckler [Quickness : Attack speed is increased by 33%], -74% duration of negative effects and 20% crit chance for 10 seconds every 30 seconds.

I hope you enjoy it, and I'm waiting for opinions and ideas.