User blog comment:DeathGodPrayer/Talk About What You Want!/@comment-213.106.131.123-20131030114337/@comment-1359322-20131030155045

The power of the Holy Swords are fixed, they aren't like Sacred Gear where they can get stronger. So the ranking of the Swords are

Caliburn > Excalibur/Durandal/Kusanagi > Ascalon.

Plus you think Ascalon which is weaker than Durandal which can't do a thing to Loki, do any damage to Rizevim which is stronger than Loki.