If you don't understand how basic geometry makes cover work asymmetrically, and are intent on putting up the same strawman (that ranged is "useless") in every single post, then you are not worth engaging with.
e: Wait, are you saying that the solution is to play Bard up front with the melee blob to avoid getting LoSed? That's incredible if so; I suggest you try it and see exactly how that goes, having no numerical defensive and a low hp pool. Unless you're immediately converting on a kill, playing forward gets you deleted - and it won't entirely stop people LoSing your cast bars anyway.