Do enchantment (e.g. +xx fire damage) and trait (e.g. +xx critical) on weapons apply to weapon skill attack? Or they just apply to light and heavy attacks only? Thanks for your help!
Pretty sure it's weapon attacks only, so Light and Heavy both. Also something to keep in mind, all of them have an ICD of 8 seconds to begin with unless you make that weapon with the Powered trait. There's also 1 set bonus that reduces this by 1 second to get you to a 100% uptime (at Legendary).