Pravana users, do you actually stock these shades?

I run a mid-sized salon with 4 stylists. We’re currently building up our color services, especially vivids, blonding, and dimensional work.

We’ve never stocked these shades:
5.66, 6.65, 8.34, 4.45, 5.45, 8.45, 7.52, 8.95

I’m wondering if it’s worth keeping one of each on hand for custom formulations or color corrections, or if they just aren't worth the shelf space unless specifically needed.

Anyone actually use these regularly? Or do they mostly sit untouched?