Pretty much based on who, between my wife's and my mains, was better geared in which classes. I wound up with BSM, CRP, and LTW. She got WVR, GSM, and CUL.

Then we sort of haphazardly assigned one each of the remaining two to our respective first alts. She got lucky and wound up with the ALC specialization for her alt, along with BSM and CRP I think. I have ARM, WVR, and GSM on mine.

When our second set of alts get to 60, we'll each take the last two specialists we each don't already have on them. We've been enjoying leveling them.

We're just filthy casuals BTW.