(From this moment on I will refer to Guardian Spirit to GS) Since life's scion is a heal I believe they are one of the worst schools in PvP, before that they were almost as strong as fire and ice.
KI said they would bring GS back. GS made life the third most broken school after fire and ice. The thing about it being OP was the fact that under critical and with sanctuary with good boosts GS could heal you for 100% of your health. I believe one way is to make the healing boosts effect it less than increase the heal to 25% this way they can still be in for other range to be defeated but still be a powerful force.
honestly i think it should have a cap like 40% of your max health in PvP, significant enough that you don't immediately die outright the same turn you get revived, while also giving the opposing team the opportunity to nip your revival in the bud.
