Spell Balance Suggestions

[spacious]

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dr is calculated as damage, yes, meaning 50% dr = 2x less damage taken. this also means your hp is doubled in this case
you just restated what he said in his og post without understanding how or why

damage resist can be calculated as damage reduction but it is easier to look at it as an increase in 'effective' hp, as falcon did above, because that's a simpler way for most to conceive of its value ingame

edit: also in fairness alanai understood how to calculate ehp