Supernatural body tier 3 DEFINITELY!! But besides that one, I'd choose Killing Ressurection.

What supernatural weapons can we get or can we make our own?

Army Annihilation insta kills them all. It's the wisest choice. But that would be boring so I went with Peak Human Body/Supernatural

I'll take personal army for fun - sit back and play real life rts, while having other abilities like healing or ability creation.