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all in allIt's all in all
Actually it's,
"One for all and all for one".
All are (proper English), All is (Slang)
"All have." For example, "all have fallen short."
All and all is a phrase it is not a part of speech. Words are parts of speech.
I think the phrase should be all in all not all and all.
All in all is used to introduce a summary or a general statement - All in all it was a good day.