Patches require Requiem.esp as well as the mod they patch.
When installing the patches, click "Merge" and not "Replace"
Patches:
Disparity* (optional BTC patch [BTC is not updated for Requiem 2.0])
Scarcity
Spell Research
Wounds
Spell Research + Wounds (If you use both spell research and wounds, use this combined patch instead of the individual ones)
Disparity: This patch only includes the gender/weight character disparity, as well as the disparity class system. The racial and standing stone edits are not balanced for requiem. (YOU MUST DISABLE THE "Used Modified Blessing" OPTION)