@Dusklicious I disagree on Seris. The old Mortal Reach boosted the heal-per-second for 25%, the new Mortal Reach boost the heal for 10%. This is hardly a buff. In addition the buff of Soul Forge diminishes the worth of the 300% range bonus a bit. In my opinion it will make Mortal Reach even worse compared to her other talents, what is not necessarily bad since her heal-bot talent is shit anyway.
A better way to rework the Talent would have been to reduce the channeling time. Instead of 1.5 seconds just 1 second with Mortal Reach.
About Io I think she will remain the best support after the nerf. If Luna gets cauterize then Rejuve should also affect her.