I am more than happy to leave string choice to the player.
There are too many factors that go into matching a particular string to a particular instrument ...and the one that can never be anticipated, or underestimated, is the ear of the adjudicator.
In the world of classical guitar, noted musicians have tried a 'selection by panel' process, where a jury of 'sophisticated ears' gets to vote in a blind test. Apparently, that is not as successful as the method may imply … sceptical commentators joke that the panel members must have been deaf as well as blind, ... with rarely a clear winner.
For ukulele ( having a narrower voicing), it seems that most discerning people can decide on a common preference, sophisticated ears or not. The most contentious issues seem to arise between those who like 'bright' and and those who like 'mellow'.
Builders, seemingly, to try to match the characteristics of the strings to the characteristics of their creations, only be be puzzled when the prospective owner says something like, “It'll sound better when I put some XYZ strings on it”.
The answer for me is to put 'generic' strings on, and let the player experiment with as many others as she/he has the enthusiasm, resolve and funding for.