The idea of “Shadowmancer” is one I’ve had for awhile and im not sure what it would be useful for. One idea i had was to make stealth able to be detonated as an ability, beyond a blast finisher. A thief cloaking into stealth from my take would be a nice way to viably make the idea of Shadowmancer a distinctive classification. Perhaps the ability of light auras to turn into dark auras as a means of turning auras against their users. It’s a small idea, but i hope you in GW2 can use it.
It’s not always about winning, sometimes its about losing without feeling used.