Sort of inspired by the video by GMTK, I spent a few hours last week making the following graph, showing synergy between the Silent cards. The arrow between card A and card B means that A makes B better.
Some of them are pretty obvious, but others, less so (example: Piercing Wail and Well-Laid Plans is quite good). There are also other cases where a card is “good” with anything: Burst is obviously “good” with any card, but particularly good with Catalyst and After Image can be procced by any card for example.
This definitely isn’t complete, and the Silent is my worst character in terms of heart kills so I would appreciate feedback.