Ishya_Chan
I'd say he's fine, an attack ability he has he just has to learn how to use them, his rock manipulation can form blunt weapons and his shields can also be used as weapons, now with dimiond body he can use that for defense while the stones can be used for offense, he could also possibly learn how to make his own offensive spirt skill maybe refined manipulation of his stones so he can shoot darts or make swords and spikes, remember just because most spirit masters only have their ring abilities dosent mean that's the only thing that their spirt power can be used for
that person is wrong this is a fanfic and fang lin is not useless but he does need an attack ability so that his character does not become one dimensional furthermore this is fic is not cliche instead i love how you put your own twist to the story instead of making the MC part of the original cast like so many other fics have done