Are there any lists for damage factors/multipliers, buff/debuff-stacking etc.?

I was thinking of making a "rotation"-simulator and wanted to know if anyone happens to know of some resources that list damage/healing modifiers/multipliers, base damage/healing and buff/debuff-stacking parameters. It would save me a lot of work. (:

Thanks! \ (: /

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Are there any lists for damage factors/multipliers, buff/debuff-stacking etc.?