i'll agree with Convicted.in the end it depends on the player, u should be able to figure such thigns on your own since stuff are basicly free, u can switch culti's anytimes u want for any tests u want also each class have its rank 8 bonus stats, they r not the same for everyone.
well if u have the epic coins for it, i think u could try the ebst options for ur rank8.since im GM i could test it and i got the ebst stats possible on a psy. i can post some SS's if u want lolbut in the end, stats wont save you if u dont know what skills to use against the several classes.same like mages, each skill on a mage have a dmg on a diferent class.for example, using Tempest is really good vs magic classes, cuz temepst have phys dmg on it.but this is about Psy's...i didnt had the chance to test the several skills but i know psy's dmg isnt like wizards, all skills hurt in all classes