If Leo is making a Grimoire like black clover then maybe have some kind of magic where he can steal strength from people (Like Ban from seven deadly sins) just a suggestion.
I hope Leo doesn't become a God. I think what makes Leo more interesting is his humanity.
Rather, I hope he is using Loki's divine power to create something that will not only benefit him but all of humanity.
GIVE THE JOJO POWER TO HUMANITY.
The real victim here isn't Loki -at most he'll be executed or imprisoned- it's the Valkyrie-chans. After all is said and done they'll be looked at with wierd gazes for trying to throw a party during an emergency.
every time I lose hope of seeing a harem author if he is not going to put harem he should remove it in genre of the book and even let Rias suffer with marrying useless chicken for just fun of leo