You'll need a custom paid bot. If you have the time, look into uBot or Zennoposter, or possibly iMacros (free version).
var urls = File.ReadAllLines(@"c:\path\to\urls");
var proxies =File.ReadAllLines(@"c:\path\to\proxies");
var cntrProxy = 0;
foreach(var url in urls){
var proxy = getWebProxyFromString(proxies[cntrProxy]); //you'll have to do this
var web = new WebClient();
web.proxy = proxy;
web.Download(url);
cntrProxy++;
if(cntrProxy >= proxies.Length) cntrProxy = 0 ;
}