Classic Hello, i havent play in a while and have some question that i couldnt found on google, thanks in advance

-How the new leveling system works in Legion? you just use the artifact weapon? or now weapons drops while you level?-now the max level is 60, i can still farm old Raids? if is the case, what expansion are posible to solo? the last thing i remember was farming Cataclysm Raids solo-why vulpera exist? via /r/wow https://ift.tt/MlOP8YC