I don't think there's any difference between retainer class-types for quick ventures.
Yeah I was looking for a whisker for AST globe back when HW dropped but whiskers are 10 - 15m on Siren because no one here can fucking beat Mog EX with any regularity. I did join a farm group for it but shit's like XI droprates all over again, not even worth the time.
Well, since this thread turned into a retainer-ish thread...
Is there a difference with the stuff my retainer brings back whether they're a MRD or CNJ? I started leveling MRD/WAR and made one of my retainers that. Then I fell in love with DRK and she's stuck at 32 unless I change her to CNJ for a level 60 cap.
Id suggest some mixture of:
A little free crafting XP every level like an Artificers, but less of it since its a feat not a class feature Roleplaying XP A resource Liquid Pain equivalent thats in the loot and can substitute for crafting XP. Bonus XP which may be in the form of the above resource from optional sidequests.