For me, Stonekeeper became the most important moster tanking set after ZOS introduced One-Shot-Dungeons. When tanks instantly die if not blocking at the right time, tanks need to block more often and longer, and this is where Stonekeeper shines. However, with these massive regen nerfs, I will now always need a healer for synergies - so no more pugging for me...Stonekeeper nerf is sad, but I wasn't using this set very often, so I cannot express my opinion about this set sufficiently.