If you take a close look at spheres such as Combat or War, that is
exactly what they're about. Combat encompasses much more than just
physical violence. In fact, all of the spheres have deeper meanings
than just their one-word name. A person dedicated to Combat will
always seek, or be hopelessly fated to encounter conflict in the
majority of their interactions. Hell, you could get away with being
and extremely impatient bastard who struggles to tie his own shoe-laces.

The possibilities are endless for what the spheres can be interpreted
as, but I don't think another sphere will be made out of something
that easily falls within other catergories. However, I think something
like a Trickery sphere could work. This would take into account the
pranksters and fools who live for little kicks, rather than grand
schemes. Eh, that probably falls into some other sphere too.

Bizarro I'm helping!