Update for everyone: the 140w charger I mentioned above works great. It was charging at around 90w for the hub, goes to about 110w if I add the remote. Still got about 30w headroom for other devices.
I am guessing the previous 90w charger does...
I know this goes without saying, but I'll say it anyway. Definitely make sure you shoot in 4K, not 1080p.
No reason for higher frame rates. In fact, I would suggest 24FPS would look more cinematic in a final edit. Go with native ISO and 1/50...