I don't know how nerfing Writ of Persistence is considered a 'sustain' nerf in ArenaNets eyes when no Guardian EVER used symbols for healing purposes but as last damage tool since our damage modifiers across the board were nerfed heavily. Instead of offering Guardians a way to ditch out damage other than using symbols and bring sustain down by making us run more offensive builds they literally have created an environment where all Guardians will run extremely defensive bunker builds which is excatly the opposite of what ArenaNet wanted to achieve with this 'balancing'. Shock Aura is being spammed by Tempests which make playing a frustrating experience, but symbols to do damage are the problem? How about taking the heal from them instead of taking away their radius? This whole nerf had 0 logical reason behind it.
You will see the first full bunker, 0 damage Guards running around in no time
Balance Patch every 6 weeks kappa