You can do this yourself in Spells.lua:
Code:
["DiminishingReturns"] =
{
-- Disorients:
[33786] = "disorient", -- Cyclone
[31661] = "disorient", -- Dragon's Breath
[105421] = "disorient", -- Blinding Light
[10326] = "disorient", -- Turn Evil
[8122] = "disorient", -- Psychic Scream
[2094] = "disorient", -- Blind
[5484] = "disorient", -- Howl of Terror
[6358] = "disorient", -- Seduction
[5246] = "disorient", -- Intimidating Shout
Waterelemental Freeze is probably missing, whereas Frost Nova is not, or the other way around. It just needs the correct spell IDs.