When playing in large PvP environments (rated battlegrounds, primarily), healers have the responsibility of dispelling their teammates. Warlocks have the responsibility of using Unstable Affliction on as many players as possible. The description of Unstable Affliction states that "if the Unstable Affliction is dispelled it will cause 2007 damage to the dispeller and silence them for 4 sec."
Does this silence suffer from diminishing returns (first silence is 4 seconds, second is 2 seconds, 3 is 1 second, then immunity for 15 seconds)?
What happens when a healer's Mass Dispel dispels multiple UAs? Do those suffer from diminishing returns (e.g. a healer that dispels 4 UAs at once is immediately immune to the silence)?
How do healers deal with the silence? Can other healers dispel the silence?
Please note that I am a DPS player that has never played a healer before, so bear with me.