Without obvious consequence I fit the same type of strings to my Kala Soprano Pineapple Uke and (otherwise similar) Kala Soprano ‘standard’ shaped Uke (so as body shape might have little consequence on string compatibility the CK35 thread could have value for you). My string of choice is Martin M600 and I’ve used then now for several years - I’m not sure if they’re quite equality as good on Concerts as they are on Sopranos, but if anything at all there’s nothing much in it. For me the M600’s are a reasonable price, last well, are reasonably available, give a good volume and give a good response across the pitch range. Maybe there are better strings but the M600’s won’t be far short of them and have beaten (to my ear) everything else that I’ve used.
