With the “The Abyssal Trap” node of the weaver tree, you can farm a few extra shades in your echoes. Problem is, shades are pretty mobile and blend well into some of the dark maps.
Other high priority enemies like champions, trapped mages and nemeses have minimap icons (which helps a ton with tracking the ones that teleport around).
Could we please have a minimap indicator for shades of orobyss too?