Here is where my problem lies right now. Even a Low 7-B end has too many assumptions to be useful. With his current tier he could already pull this off using the China end with a little bit of exertion per day. I'll use his most casual tier making feat to explain, and hypothetical assumptions of my own to explain this. If we consider his pumping out energy to be a very exhausting thing, we know Gojo has extremely casual feats that reach High 7-C [164.16 KT, which he did as a aura farm flex], which I will call 1 GU [Gojo Unit]
If he pumps out 1 GU per second for a for just half an hour, that generates in excess [
1.236E18] of a day's worth of energy to the entirety of the country. Even if they think generating that much energy would be physically demanding like exercise for a normal person,
the avg healthy person can do wayyy over 30 min of intense exercise per day if you spread it out. They can decide to space out the energy draining throughout the day if they're nice about it lol.
Even if they thought Gojo pumping out the energy to equivalent to a marathon of exertion [
with the average marathon taking 4.5 hours to complete] could get over half a months worth of energy from one day [
1.11266E19]. They could very well have been intending to break it into blocks where they take his energy, he is able to rest for a week, rinse and repeat, which still result in a net of energy independence for a lifetime.
Am I saying this what they were thinking, obviously not because we aren't given any significant information about how they would do this. But I am arguing that there are ways for them to do this that need less assumptions and don't change his tier. Hell, we don't even know how they planned to keep him captured.