Crocosmia Question-should we throw away large corms??

My mom is digging out Crocosmia Lucifer that has been growing for many years.
Some of the corms are the size of a child's fist, with progressively smaller corms stacked (laid side by side?) attached to them, sometimes in stacks of 7 or eight.

Obviously the corms offset by putting out a new corm , etc. and obviously the smaller ones will get larger and will bloom (maybe next year? 2 years?)

Lets say that you have a stack of corms that is, for example, 6 corms deep/tall/wide (not sure where they grow spatially), the largest 2 being huge, the rest tapering down to 'tip-of-your-thumb' size.
Here are my questions:
If you separate the corms, will you have 6 viable corms?
Will the largest 2-3 corms grow best? Not at all? The same as the smaller ones?
Has the largest corm(s) blown its genetic wad and should be thrown away?
Or will it not bloom, but produce new corms that will?

My mom in Washington State (zone 8) wants to mail a box of them to me and she does not want to waste space or postage on the largest ones if they are not the good ones to have.

Thanks in advance for your help (pictured is Lucifer with Shasta Daisies)
Lorie in SC
(yeah, I know it is not the best time to mail them, but am I going to say no? NOT! I will take my chances)

I plan on digging my clump in the fall to renovate a bed and I've never dug them before so this is going to help me a whole lot! I dug up some gladiolas last year and must have broken off some of the baby corms because a bunch of baby glads grew there this year. I would think it probably helps them being dug after years in the ground....my Lucifers have been in the ground probably 6-7 years. I sure love them ! kim

Pyro, its typical for corms to replace themselves each year with a new corm (+ babies usually) on top of the old one, and often with 2 or 3 new corms. The viable corms should have foliage attached and will be those at the top, the old ones typically shrivel up and are darker in color. A large corm will often replace itself with several new ones, some larger and some smaller, so size isn't a determining factor in which ones to toss. Typically when you find a stack of them stuck together, its the top ones that are the keepers, and usually pretty easy to tell by color, firmness, and foliage attached.

Thank you, Gem, I will pass that on to my mom!

Thanks pyromamma. That was a big help as I too will be digging mine this month. I feel much better about it now. : )