In your scenario, I would cut to 16” and 8”. Then split the 8” exactly in half or fourths (as close as I could get) then put the two 8” halves end to end in my 16” stacks.
For me, my splitter handles up to 24” , and i am way off at times when i eyeball the length on a log cutting some at 16-18”. Since i prefer longer splits for the boiler, that can take up to 48”. As i split have a second pile of “fireplace wood”, that goes int our indoor fireplace for cold weekend burns. I keep near a cord of i5 at different seasoning stages. then of course i keep uglies and shorts for the boiler. Fo4 your situation, i would cut the full length for the burner and keep a “shorts” stack to just fill in whe; yo7 hink it needs a little mor3 added.
I cut to size,.and split and give all shorties and uglies to my neighbors (elderly, fixed income, not able to cut and split). They pile them in a tent for one season and then burn them in short hot fires in a small stove. (I tried to educate them about drying but it's hard teaching settled folks new things. So I split them small for them.) They are happy as they don't get crap (bottom of the pile) wood as from their other contact, and I'm happy because everything that doesn't stack well or is short doesn't need to go in my stacks.
