Olivia wrote up a great overview of the Proving Grounds for tanks, healers, and DPS. Today I'm going to be going a little more in depth on the healing side of things. Bronze and silver were excellent warmups. I wiped once on gold due to my over confidence on the final wave but managed to overcome it. This is what the Endless difficulty on Proving Grounds looks like for healers. You'll gain a certain amount of points per round and it will continue to tick upwards until either you or a party member dies in battle. Thankfully, the NPCs will appear in your party frames. There's a spiffy achievement if you're able to reach Endless Healer: Wave 30 which nets The Proven Healer title.
Watch the video above as I play through the Endless Healer for the first time! I also narrate my spell choices and reasoning as I heal through the assorted waves.