Glad your trip was fun and so sorry to hear about your loss.
I've noticed Duncan's need a lot of flow once they really start to split and grow heads. Once 1 head starts to go the rest follow pretty quick. Band saw is the only way to seperate the heads through the flesh cleanly.
For torches the restore feeding is pretty good for long term. Soak food in some and then spot feed.
If you have fish that won't allow you to spot feed then you can broadcast the whole tank. Or remove the torches and give them a bath for 24-72 hours.
Have a small plastic tub set up with egg crate, a heater, powerhead and or airstone. For this I think restore alone is fine, especially if the torches are not showing signs of stress.
Use tank water and no acclimating is necessary.
Oh sh it, I'm so sorry to hear this as well.
Others gave great advice and the inkbird will help