Abadom

Yeah...

This is a combat gear, its the closest thing I could find

"Another power boost" is a little vague, he was never handed power from his Classess aside from when he received the cursed blood. Everything else he had to try to get it

I do have ideas

Probably, yeah, Fate tends to scale up pretty fast. Philip is barely about street level if we follow that type of powerscalling

I was thinking of a super small (Either one or half a chapter) adventure into another Class like this

Nier Automata is fun and all, but if he's sent there, he'd die soon after because the world is covered in the virus that ended Humanity or something like that

Maybe, but the idea is that most martial arts from manga usually are based on real ones, its the same for The Rodrigues School, the Yaguiu sword technique or something like that is real

Hunter weapons are essentially overly steampunk mechanical tools, it's not really technological in any way. The rest are just infused with magic or something like that