I have no idea what to do with the information you provided. I followed it and after changing the spell and saving the addon I have a new folder in /Mods containing a file called meta.lsx. That's it.
I think I'm gonna have to find somebody to actually do it for me:
Mosquito Swarm's cooldown to 2, Raining Blood, Shackles of Pain, Black Shroud, and Blood Storm down to 4, and Bone Widow's duration to 7.
This whole thing is clear as mud.
