I usually explain the builds i make in great detail with some sort of long written tutorial, but I think the video's will speak for itself about this build.
In this post patch environment, it's pretty hard to piece together a decent healing build that can hold it's own in WvW zerg setting. But after a bit of theory crafting i found an interesting...mechanic that seemed pretty interesting to take advantage of.
The way it works, is that you have Energy Expulsion on Ventari set to autoattack. This will explode your tablet the moment you either swap into the Ventari, or reach 10 energy (Given that the tablet is out.) To rebirth the tablet, you use Ventari's Will, and it will automatically summon back your tablet to explode again...and you repeat this process over and over by just spamming Ventari's Will. This will effectively put you at a perma 0 energy. However the perks that come from this is the fact that we are using the explosion from ventari to create orbs, and cleanse conditions. The way the traits align, you are able to gain healing from...
1) Ventari's Stance passive
2) Orb production via orb traits
3) Vigor granted from said orbs, which procs Elevated Compassion
4) Energy Expulsion Healing.
So every 3 seconds, you are doing significant healing to the majority of your squad. To do this effectively, you should have your targeting set up correctly, which means having Instant target, and automatically select ground target, so that when you have your tag selected, mashing Ventari's Will, will reposition your tablet very fast to the commander and then subsequently explode, this is QOL and just makes better usage of the tablet's orbs.
Aside from the above, there are multiple avenue's and builds you could approach this from based on play-style. I decided that Mallyx rev was the most fun because of it's access to Resistance, as well as mobility. Pulling conditions from allies doesn't count on the cleanse meter, but if you need to be in mallyx for some self survival, you can at least be still "cleansing" and resisting conditions on your allies, until you can swap to Ventari again.
Questions? Ask me. Have fun.