I fell behind, sorry
I'm only elaborating on about half of the combos mentioned - typically popular PvP synergies, branched synergies, or hidden effects (like PU dolls). Anyone who wants to work ahead of me, or fill in the other ones, would have my gratitude.
EDIT 0: I've also been trying to get into two habits - copy-pasting the same singulars, and keeping the in-element card listed first. For consistency's sake, I would recommend this as well
EDIT: Finished Darkness.