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Both skills which can be used with some staves, or wands are not properly scaling with magic attack with dark diviner active.
According to the wiki, Party healing especially scales 1 hp recovered for every 5 magic attack. So with 1000 magic attack, you should heal 200 additional hp on top of the base amount of 160hp healed.
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If some of that Magic Attack is coming from the new Arcana, its possible it is only valid for Talent Skills (i.e. Mage and not Cleric)
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If some of that Magic Attack is coming from the new Arcana, its possible it is o...
I even converted my staff to S-Type, and I am healing about the same amount.
It's only counting the skill's base healing + modifiers, and not magic attack conversion