Originally Posted by
Drexelhand
Well, Nathan himself says: "The stone... the Life Seed... it's how I'm here. It increased my powers. At first I thought it came to save me, but it still didn't. I'm still dying. I can't save myself. So why did I find it, why did it give me this much power, if not to save myself?". And upon re-reading, with the knowledge that Nate was depowered from his Shaman level, it can be conjectured that being in that state made him start dying. With that known, that statement can be interpreted one of three ways:
(1) Nate is stronger than he was before as a Shaman but his usage of his powers aren't unlimited anymore because he's dying and back at the risk of burning out.
(2) Nate's base strength is stronger than it was before but if he has to draw on the Life Seed to increase his strength.
(3) Nate's powers are stronger than they were before as in when he was depowered and just a low-level telekinetic but the Life Seed has still put himself bounds ahead of everyone else, even if he's not as strong as he once was as a Shaman its enough for him to resume his duties.
It honestly is probably a mix of all three now that I think about it.