I'll be in the same boat with shipped eggs soon too and looking to get every last one of those little buggers across the line.
There are a few extra recommendations for damaged eggs.
Saddled air cells should be weighed from the get go as air cell size may not be very evident for tracking weight loss: they should lose roughly their weight x .04 every 6 days. (Or around 12%)
Rotating should still happen, but make much smaller adjustments.
Detatched air cells should 'not' be turned or only turned a very small amount for the first 10 days and then positioned upright for hatch.
Cracked eggs can be mended - the area should be sterilized and then use clear nail polish or kid-safe crafting glue to paint over the crack and reseal the egg. Larger holes can be patched using boiled egg shell cut/chipped to fit and sealed as above.
Obviously, if you're patching eggs, candle often for signs of bacterial infection and keep an extra special eye on them come hatch time to make sure the patch does not interfere with hatch.
I personally wouldn't wash my eggs, as I'd prefer to let the bloom do its job, but there was s a whole procedure for that if you're really worried about contamination.
When in doubt, or you're really committed to saving an egg, do a Google search for egg guides for rare and exotic birds - they are much more committed to saving every egg than the chicken ones. I stumbled across a DOC guide for handling shipped kiwi eggs that way, which was really good.