Well, here's what I've seen/noticed/pondered over my 21 years of playing:
I've had at least 3 basses w/ slight to badly twisted necks (bought that way) and it's always been the treble side that was arced up or had more bow. Coincidentally, practically every set of strings made have E and A strings that have considerably less tension on them when tuned up than the D and G. I've seen some sets where the E's tension is half that of the D or G.
So, whenever I shop for drop D sets, I always try to get a heavier E and lighter D and Gs if possible.... something like 120, 85, 60, 40. And I prefer 110, 85, 60, 40 for EADG tuning also.
I've had at least 3 basses w/ slight to badly twisted necks (bought that way) and it's always been the treble side that was arced up or had more bow. Coincidentally, practically every set of strings made have E and A strings that have considerably less tension on them when tuned up than the D and G. I've seen some sets where the E's tension is half that of the D or G.
So, whenever I shop for drop D sets, I always try to get a heavier E and lighter D and Gs if possible.... something like 120, 85, 60, 40. And I prefer 110, 85, 60, 40 for EADG tuning also.