* +1 HP or [[#Luck Modernisation|Luck]] is guaranteed from using pairs of DEs.
* +1 HP or [[#Luck Modernisation|Luck]] is guaranteed from using pairs of DEs.
** There is a small chance (~6-7%) for an extra +1 HP if the pair is Kai.
** There is a small chance (~6-7%) for an extra +1 HP if the pair is Kai.
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** It's been observed that the higher the total level of two DEs used for modernization, the higher chance you will get +1 HP. If the '''total level of two DEs is around 180 or higher''' (each of them lv 90+), you can get 90% +1 HP [https://twitter.com/Matsu_class_DD/status/1188450823769968641]
* The success rate for AV modernisation can be increased by adding more duplicates.
* The success rate for AV modernisation can be increased by adding more duplicates.