User blog comment:B214/Volume 21 info & spoilers/@comment-83.7.233.159-20160420144354/@comment-24.113.129.70-20160423222050

Rossweisse has proven that you don't need alot of power to use powerful spells. She uses a magical formula that allow her to use a spell for only a fraction of what it usually requires. Since we know that this is possible for a magic user who hasn't even lived 20 years yet, then we can assume that the Biblical God, who has lived for as long as existance itself, can do the same thing on an even greater scale.

I'm not saying he's one of the weaker gods, like Loki. But I do believe that he is at least as powerful as one of the Heavenly Dragons in their prime. He's just got enough tricks up his sleeve to "roll with the big boys."