I rate it above calcium partly because it links me more closely with Johnny and Roy, and more importantly because it can be used for tricycliate overdose, and for crush injuries (I have never used it for these indications).
I don’t use calcium very much, but there is one situation I always reach for it in — cardiac arrest in a diaylsis patient. While we don’t have labs in the field, a dialysis patient is a possible bet to be hypocalcemic and/or hyperkalemic, and calcium can save lives if they are.
I am speaking only of the Tylenol in my kit and not my own personal stash. If I were rating my own personal stash of Tylenol, then I would have to add Tylenol and Ibuprofen to my as yet unrevealed list of Eight Essential Drugs, making it The Essential Ten.