Sword Art Online: Memory Defrag - Upgrading/Evolving Ordinal Scale Armour
Just demonstrating the equipment upgrading system with the test subject being the OS Battle Dress currently obtainable in the Ordinal Scale event.
The best way to get this (or the OS Battle Coat or Augma accessory) is to get 4 drops of the R3 version of it from the final challenge; the LV80 dragon fight. From there, upgrade one of them to max, "evolve" it to a 4-star item and then upgrade it to max again.
For your efforts you will have armour with a bonus of 3207 HP and 1020 Defense.
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