I wanted to create a funny build utilising Shard canon technique, it is not optimised at all (first 3 stances are taken from my mixed celestial build), but it sustains itself on shards without talismans or artefacts. The only required mastery for sustain is "increased shard max gain" in "double your shards" technique. Tried it in the Chasm and it was feeling pretty alright, with no weapon related talisman, armour or artefact. It was also nice at shredding marionettes except of course Merciless.
If you want to empower the build with other schools, just use this talisman and add "comet star" as "Do fifth" with masteries for more attunment stacks.
Have fun
also since machine gun is available from CF, I might do a CF version or a generally optimised version...
🫡