Wiki / DR & CC
Diminishing returns & CC
How DR works
Each time crowd control of the same category lands on you, the next one lasts less: 100% → 50% → 25% → Immune. The category resets 14 sec after the last application. The DR tracker on your frames shows the next duration (1/1, 1/2, 1/4, IMM).
Categories
Stun
Shield Bash, Cheap Shot, Leg Sweep and other stuns.
Root
Frost Nova, Entangling Roots and other roots.
Polymorph
Polymorph has its own category, separate from Fear and Cyclone.
Fear and Cyclone
Fear and Cyclone share one category.
Blind
Its own category.
Incapacitate
Gouge and Dragon's Breath.
Freezing Trap
Its own category, like WoW's trap category.
Impact
Combustion's Impact stun has its own category.
Silence
Garrote, Silence and reflected silences.
Breaking CC
Gladiator's Medallion (V, 50 sec cooldown) removes all stuns, roots, slows, Polymorph, Fear, Blind, Gouge and Cyclone effects. It is only usable while crowd-controlled. Some defensives and mobility spells also work through stuns; their tooltips say so.
Interrupts lock the spell school you were casting for a short time. Each class has one on 6 by default.