Well, okay, that's basically not using the character then. I guess you still get the defensive option from his E, but that disappears rather quickly.
Turns out that Hu Tao goes great with Bennett after playing through ~20 domains (I had to farm books).
I can easily maintain the sub 50% HP buff with him on the team since he only heals up to 70% and due to Hu Taos large health pool, it won't go much further than that.
I can't make use of the ATK buff, but at least I don't have to be scared about Hu Tao dying all the time since Bennett Heal is basically always there whenever you need it.
Ganyu and Xingqiu also work like I expected them to work. Although I have to admit, I have no idea how to make Hu Tao be the trigger for elemental reactions. That's almost impossible when it comes to auto/charge attacking without losing damage due to simply not attacking (what's the point then).
I do have ultimate up on every cycle though, and that's where I can actually use melt/vaporize.
But I'm thinking about switching to Lavawalker. Her autoattacks are so fast and her charged attacks, while powerful, basically miss half the time and go waaaay too far imho. If enemies are lined up, it's great, but it also pushes away mobs which splitts them up again.
I weave them in here and then but that's about it, I can't see myself constantly charge attacking. I have the stamina for it, so I don't really know what C1 is good for.