Haste affects spell GCDs only. So it would work on army of the dead and death gate, but those spells are longer than 1.5 seconds so you wouldnt notice a difference.
What you are seeing with GCDs, and I don't completely understand it myself because nobody was ever conclusive on it, is apparently for some reason if you are chaining runes the refresh time on the runes can go from 10 seconds to like 8.5 or something like that.
from http://dominateyourserver.com/2008/12/23/death-knight-runic-power-system/
Quote:
"If the attack missed then any runes utilized will be placed on a short 1.5 second cool down, if it landed successfully then a 10 second cool down ensues. There is an exception to this rule however in that if a rune is consumed within 2 seconds of its cool down expiring; it will only be placed on an 8.5 second cool down period."
from http://elitistjerks.com/f72/t36303-dps_compendium/
Quote:
"It was always assumed that Runes just had a pure 10 second regen time. This has proven to be false from various tests. The behaviour that has been noted is that after the first set of runes very often runes regen after 8 seconds. The current concensus is the following:
Runes have a 10 second regen time. However, if you do not use your regenerated rune as soon as it comes up, it will activate a timer (up to 2 seconds, is the current theory) which will count as the Rune being used."
That might be this "haste" you are seeing on your runes. Basically it will shave up to 2 seconds off the rune's cooldown time if it is used within 2 seconds of its cooldown refreshing. This gives DK a good reason to always keep runes on cooldown and chain quickly.
Edited, Feb 5th 2009 10:08am by EnthalpyTheBurninator