I can’t rank them as the weakest link would glare IMO. Great cartridge is huge but has to have a great arm to perform at its best. Then the phono stage has to be up to par with the arm/cart.
Until I upgraded my tonearm to a basis vector 4 I thought the same thing as Russ above. But man what a difference it made to my presentation it was jaw dropping compared to other upgrades I have made. After all the arm just gives the cartridge a ride, right? Man is that ever an understatement.