Hm, agreed on the dex food point for rogues/stalkers... didn't think of steal somehow even though one of their unique point is the auto-steal.
Like Namin? said, she was being random in Crusader path... indeed their builds vary so much in all directions that thinking of an item to help all/most of the different builds is simply difficult... Surely Mr. Krogoth has a much more indepth understanding of the job as he owns a paladin personally.
Personally will say that Linkers do decently fine with rainbow cake, because linkers sadly got only 2 or 3 builds... Esma linker is restricted to pvm only, which is where matk (and basically the only linker build) is used. Rainbow cake still gives chances to those who are fortunate to have a Dagger of Counter in woe circumstances. Making elemental converters always seemed to be a "sage thing" for Namin?'s mind... on top of that being their platinum job ability quest. Cursed Water has always been one of the most powerful benefit of the annoyingly long Sign Quest too.
EDIT: changed her prevoius list to reflect Mr. Krogoth's great suggestions