1. no idea.... think it was about 5 secs off the top of my head but not 100%. The reason I have no idea is that Zos changed the set a while ago to only proc from fully charged heavy attacks rather than partially charged heavies... after that very few people have really used it as it's a DPS loss Vs just about any other set.
2. Here at least I have good news... .yes you can dye it black!