Card (Mod)

• Quick Slash (On KO, gain 1 Strengthened)
  
• Quick Slash (On KO, gain 1 Strengthened / Any)
  
• Slash (Quick)
  
• Slash (Quick)
  
• Wrath (Draw the last attack played)
  
• All Out (Quick)
  
• All Out (Quick)
  
• Bladestorm (Any) - Not sure if this card can roll Quick or Free, but it's not mandatory to roll them.

Passive

Master of the Hunt - Reduce all Hunter Collar thresholds by 1. Hunter is immune to all negative status effects.

Collar

Balanced Collar - Draw 2 Hunter cards. Free.

With "Quick" mod being available to this deck's offensive cards and Balanced Collar (Draw 2 Hunter cards for free) being generatable repeatedly in a single turn, you will have practically an infinite card play, so it's very possible to complete a mission in just one turn and even without spending a card play.

The plan is to make sure that The Hunter downs at least 1 enemy with each attack, so the Strenghtened buff from Quick Slash's mod and Wrath (applies Critical to all Hunter cards) will help to achieve this easier.

In terms of completion speed, an Iron Man / Nico / Worldbreaker / Dark Hunter build/team will generally outperform this build, since this will have you kill enemies one-by-one, but this build is less demanding strategically and you can use anyone with any role to accompany The Hunter.

Some notes:

• Kill a minion with Quick Slash as an opening/as soon as available to gain 1 Strengthened.
  
• Use Wrath as soon as available to make all Hunter cards critical for free. Also +1 collar build-up.
  
• Play 2 power cards to draw a Balanced Collar card, which allows you to draw 2 Hunter cards for free, use it before playing another power card.
  
• All the cards in this deck are power cards except All Out. So All Out won't contribute to your collar build-up, but this is your heavy killer card and it can roll Quick. Plus, "discard all Hunter cards, draw 2 Hunter cards" does more good than harm in almost every case, especially with this deck.

Story to Heroic

Anyone. Hunter can get the job done alone.

Ultimate

• Dr. Strangelove - Astral Meditation will let you use Major Strength Tonic for The Hunter for free. Blessing of the Vishantis and Crimson Band of Cyttorak also compliment the build, and all three cards can also roll a "Free".

Not an inch-perfect run but you'll get the idea how the build works. And please skip the "thinking" parts, i have a smooth brain.