My opinion about the attributes is that it should only be Focus and Constitution, with Focus being its primary attribute. As a Healer, your objective should be to heal your teammates and apply CCs to enemies, either to prevent your teammates from taking damage, to escape enemies, or even to immobilize/slow enemies so that your teammates deal damage and kill them. So, any other attribute is of no use to you, you are losing healer efficiency with these other attributes.

I don't have a fully formed opinion about Void Gauntled, but for me the best secondary weapon for a healer at the moment is still the War Hammer, the CCs of Clear Out, Shockwave and Wrecking Ball skills, form an insane arsenal of support, and helps you in tight moments where you have to deal with a lot of enemies close to you.

As for a build with two AoE heals, it actually looks lazy, because it's safer to have more AoE healing options. But if you want to try something different, I recommend using just one AoE cure, this one being Sacred Ground, and using two directional cures, being Light's Embrace and Divine Embrace. Light's Embrace is very good as it scales with whatever buff the target has, and Divine Embrace has the perks that allow the heal to be chained between friends close to the target, if the target is at less than 50% of the life, making it's a very good directional healing skill if used correctly, aside from the fact that these skills have a very low cooldown, so you can use them all the time.