In that case, you can’t even prefer one person with pain to 3^^^^3 people with the same pain.
(And if you say that you can’t add up sizes of pains, but you can add up “whether there is a pain”, the latter is all that is necessary for one of the problems to happen; exactly which problem happens depends on details such as whether you can do this for all sizes of pains or not.)
As I don’t think pain can be expressed in numbers, I don’t think it can be added up, no matter its magnitude.
In that case, you can’t even prefer one person with pain to 3^^^^3 people with the same pain.
(And if you say that you can’t add up sizes of pains, but you can add up “whether there is a pain”, the latter is all that is necessary for one of the problems to happen; exactly which problem happens depends on details such as whether you can do this for all sizes of pains or not.)