User blog comment:B214/General Discussion/@comment-1359322-20150428161805/@comment-1359322-20150429062702

@anon, Issei does use the Ascalon, but since Ascalon can't do ranged attack like Durandal or Excalibur, so Issei tends to use it by infusing his attacks with Ascalon which is actually much efficient. Ascalon can get broken in battle and needs time to repair, while the Scale Mail can repair instantly, adding Ascalon's Dragon Slayer Aura to the Scale Mail would be much more safer.