Damien, on 07 December 2012 - 08:29 AM, said:
Since you have 3 bolts, you will deal 120% of the initial damage, or +20%. This does not translate as a direct +20% damage increase (as is the case for using Icy Veins
without the glyph).
Damien, on 02 March 2013 - 05:35 PM, said:
so with 100% haste you cast it in 1 second, hence the 22% value (i.e., the value at which you will start casting Frostbolt in less than 1 second with Icy Veins and Time Warp enabled).
You answers are very detailed and helpful. Thank you. But I'd like to point out an issue.
I think your focus is on the wrong spells. Even though haste effects stack multiplicatively, an un-glyphed Icy Veins is only a 20% boost for Frostbolt, mage bomb (Living Bomb, Nether Tempest, or Frost Bomb), and Frozen Orb.
In the real world it is not hard to get 20%+ base haste in a raid scenario. This means an un-glyphed Icy Veins will do nothing for insta-cast spells during Heroism. (The GCD cap is 50% haste.) Effectively making it not a flat 20% buff.
I can understand how an un-glyphed Icy Veins would function very well outside of Heroism. However, Heroism is when many cooldowns are stacked. Frozen Orb and Alter Time make it very easy to have lots of FoF and BF procs during this time. I averaged around 60% of my Heroism time casting instant-spells when simming on the PTR this past week. If you are going to use Icy Veins during Heroism, it is much better to have it glyphed.
Edited by myhammy, 05 March 2013 - 11:24 PM.