Maarselok

(5 items) Dealing damage over time applies a stack of Blight Seed to the target for 5 seconds. At 20 stacks, Blight Seed explodes, dealing 667 Disease damage to the target and nearby enemies, increasing by 150% per additional monster hit, up to 600%. The damage scales off your Weapon or Spell Damage and can occur once every 1 second. Enemies can only have one Blight Seed at a time and require 20 more stacks per group member wearing this set.

(5 items) When you take damage from a melee attack, gain a corrupting aura for 5 seconds that applies Minor Breach to all enemies within 8 meters of you, reducing their Physical and Spell Resistance by 2974. This effect can occur every 5 seconds.

(5 items) Your Light Attacks apply the Touch of Z'en on enemies for 20 seconds. Enemies with the Touch of Z'en take an additional 1% more damage for each damage over time effect you've placed on them, up to 5%. Enemies can only be affected by one Touch of Z'en at a time.