Quote from Kenero;1098952:
No, I should make myself clear:
1. 2 Hymns will not stack.
2. 2 of the Debuff effects will not stack
3. 1 hymn + 1 of that debuff will stack.
4. Same-song does not stack, only the highest will apply.
5. Different songs will stack.
Okay, I think I get it now.
As of NA, nothing is stacking properly. It got fixed yesterday in KR.
Test it yourself if you don't believe me.
[spoiler]Based on testing my fireball takes 14 seconds to load with 1000 intelligence and just over 16 seconds to load with 0 intelligence. This being with a 36% casting speed phoenix fire wand.
[Image: http://i.imgur.com/AXd3gvj.png]
Then using 1000 intelligence, I compared to a similar wand with speed reforge and noticed the casting took 14 seconds for both.
[Image: http://i.imgur.com/s2PwQc7.png]
My lag for 5 charges appears to be around 1.9 seconds today.
Test it yourself if you don't believe me.
:evil:[/spoiler]