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I use the reaper crest almost exclusively. My only real struggle with this game is boss fights and the extra silk from reaper gives me more staying power. I expanded the crest fully using all my memory lockets.
The other crests look fun but I doubt I'll do more than dabble with them
I use too much reaper's because the pogo is easier and I can gather more silk which I use mostly for healing. Basically the same problem I had in Hollow Knight. I mostly heal and don't use soul or silk for anything else. At least in Silksong I occasionally use tools.
I used Hunter in the early game (even for quite a while after getting several of the others), but eventually switched to Reaper and have stuck with it for the most part since then. I used Shaman for the juggling challenge though, I think.