Having the option to use Vigor in some spells

If I removed these two things from the code, would enemies stay the same (aka vigor as a random number, no stamina)?

Yes. Just comment out that code before you apply the patch.

The hyper wrist, Genji Glove and gauntlet mods in the code- I have applied the Ultimate Damage fix. It also does stuff with the Genji Glove and Gauntlet. I wonder if there would be any conflicts?

I don't know. If that fix modifies the same offsets, or the offsets called by, my code, then it is likely these patches will conflict.

Edit: I had a look through Leet Sketcher's code. His patch is a complete rewrite of the damage calculation functions. As such, these two patches are incompatible.

His fix looks very comprehensive. If it's compatible with other bugfixes, I might recreate my mod with his code as a base. For now, you should consider my hack a testing ground for its revised damage formula, no more.