Lee geon should da have gotten those powers not the kids...

It's still his ToT. But they're lending parts of their power to the kids. The kids are like other saints and Lee Geon is the god supplementing the powers.

They will be useless, he’s the one granting healing and he’s akready a destructive powerhouse on his own so what will he used them for ? I rather the kids have them, though I’ll worried about kali too ..