Or go to a Mystcraft age where there is some effect that increases pressure.
The problem with that, though, is that the human body can only take so much pressure without switching to a helium oxygen blend, and that only lasts until it becomes too thick to be able to be absorbed, which is around I'm remembering 40 atmospheres of pressure.
That will not be high enough, surely.
But when we start using a full solar unit of power, we'll have to dyson box some other stars (and set up ender chest turtles to move the power) as well. Better just aim for that from the start. Maybe some dyson hyperspheres.Let's just Dyson Box the sun. That'll do 'er.