Instead of Power-return, new idea for our legendary skill 'Bow of the Righteous':
Make it a buff for each our damage-types. If a hunter with this legendary trait crits or devestates on a mob, the mob gets a debuff to resistance of the damagetype used. If light or fire-oil are used with the legendary trait the debuff agains fire and light gets applied in addition to the usual fire-bleed or the miss-chance. This way, a hunter is more appealing to groups/raids if they use this trait.
Another idea, to improve this would be, that if the debuff is applied to a mob, and a character of the same group crits while the debuff is applied, another debuff of the same type, but maybe even higher is applied. This way, the debuff for a solo playing hunter must not be that high being OP but still being useful, yet is tremendously increased during group play.
Pros: People are going to ask about the weaknesses of a mobs/bosses again.
Cons: A bit difficult nowadays to change damagetype of a bow for a special encounter, or even during fight agains several different mob-types.
PS: English is not my first language, the style might sound a little bit off.