As has been discussed in this thread:

https://forum.square-enix.com/ffxiv/...ithout-healers.

We're getting even more self-healing on abilities like Rampart, Vengeance and Sentinel so it'll be a breeze to 1tank/3dps dungeons even on PLD/DRK/GNB.

I would like to make this the official PARTY THREAD sub 10m dungeons here we come.