Still most people have one for various reasons (getting Bows to S or so); that and they're so cute. I hear Some Archers can use guns (Not sure about D3)
I know these are old comments but I fought against land of carnage archers in Disgaea 3 with raise enemy strength thingy passed as high as it can be. They were so deadly even with my characters recarnated lvls in the 10ks and my actual lvls only 1k higher then theres at the time.