>You could always leave the core of the current system, but
>augment it by creating a 'minor shield', 'minor aura', 'minor
>barrier'. These wands could be ubiquitous, for sale
>throughout the world, but with a flaw.

How expensive are they?

>Their protection will
>only absorb a finite amount of damage before they crumble,

How much damage do they absorb?

>new protections cannot be reapplied until after the initial
>casting has worn off.

Meaning what? I can't use any A/B/S until my minors wear off? Or I can't apply any Minor A/B/S until the affect wears off, but it's no longer absorbing any damage?

>If you wanted to make the minors less
>powerful, have a delay time between crumble and reuse even if
>they have not been fighting, like a crumble at 12 hours and 24
>hour timer instead of 18 hour crumble and 24 hour timer.