Bar 1 - Dual Wield: This bar is the main The main use for this bar is to get major Brutality, so I feel like going 2h may actually be better, but I'm interested to see how this works out.
Blood Craze: Decent DoT/HoT combo. Keep up on many enemies for more healing.
Poison Claw: Poison DoT
Noxious Breath: Major Fracture, Poison
Volatile Armor: DoT and Major Ward/Major Resolve, also returns damage to attackers.
Shrouded Daggers: Ranged Major Brutality that bounces to multiple targets for increased damage.
Ultimate - Corrosive Armor: Strong Defensive ability plus poison damage, AND attacks ignore physical resistance while active.

Bar 2 - Bow: This bar is for more poison DPS
Lethal Arrow: Major Defile plus strong poison damage out of stealth
Acid Spray: Poison, Poison DoT and Snare. May replace with Camo Hunter
Reflective Plate: Snare Immunity plus projectile reflection
Poison Injection: Poison Damage, Poison DoT, Execute
Crushing Weapon: Added bow attack DPS and Healing
Ultimate - Toxic Barrage: Huge Poison Damage plus Poison DoT