Originally Posted by
Sida
The battle class retainers can bring in all those ingredients (apart from rare boss drops) that you can get with killing things. They are absolutely golden because while you can go gather a pile of, say, lumber in no time, just go in gathering and you are quaranteed to get it, getting a decent amount of things like horns, night milk, leather requires you to go kill stuff and even then getting the ingredient is far from quaranteed drop. With retainer you can just tell them to go "get those antelope horns pls thx".