Multiple boils are not needed at all for rue in my experience. Just toss 3 - 3.5 g in a pot with some lemon juice and boil until there's a drinkable amount left (usually 30 min). It's better practise to filter before reducing but I can't be bothered and it works all the same.
The bark does need some more time. Adding lemon juice will help get the goods out of the wood faster as well—just have clean water to rinse with when it comes time to drink, because it will be
n a s t y.
Drink the rue half an hour before the DMT brew for the best result. And, remember that setting is key.
Good luck in your travels!
I don't want comfort. I want God, I want poetry, I want real danger, I want freedom, I want goodness. I want a clever signature.