I really dislike the current hat as it boost damage, although it is well needed, for a skill that is a very popular build. If we want to keep the idea of these hats boosting skills that are not extremely common, then I believe the hat should boost [Reverberation], rather than [Sereve Rainstorm]
Here is a basic idea I made for it:
Night Sparrow Hat [1]
Increase ATK and MATK by 5 per level of [Voice Lessons]
Reduces SP cost of [Reverberation] by 20
If refined to level 7:
Decrease [Severe Rainstorm] damage by 50%
Increase [Reverberation] damage by 50%
If refined to level 9:
Further increase ATK and MATK by 5 per level of [Voice Lessons]
The ATK and MATK increase are there to support the damage formula for [Reverberation] as it uses both MATK and ATK to calculate damage.
Edited by st4rw4k3r, 03 July 2014 - 12:35 PM.