Does convalescence stack with defiance?

[Kirisu]

Stoneskin and are indeed exempt from healing modifiers such as mantra and convalescence, this is because they absorb 20% HP and heal 25% HP... Respectively. Now, because of this, the greater the recipient's HP the more efficient the spell will be, this is especially true for stoneskin.

For example, i top off around 14k HP, (With thrill of battle) SS is obviously going to absorb a LOT more damage for me Than say... A 8-9K HP paladin.