I think doing it the fullbring way is better though, because iirc they mentioned when he gets his powers back, he also is able to use fullbring, so he can absorb other fullbring abilities or something (relieve them of their "curse") and be 100x more powerful.
Spoiler
He can already use Fullbring, but doing it this way is agreeably much better because he'll obtain the Fullbring powers of all the members of X-cution.