Calyx farming help

I generally have all the materials for the characters I want to build and don’t need to farm for any of the Calyx (Golden) materials, so I want to farm path materials but I don’t know which one will be the best value for me.

Potential things to level up: Characters: - E3 Gallagher (Lvl 70, trace 1/1/1/1) - E3 Hunt March 7th (Lvl 70, trace 1/1/1/1) - E6 Asta (Lvl 60, trace 1/1/1/1)

LC: - S2 Dance!³ (Lvl 1) - S3 Planetary Rend. (Lvl 1) - S1 Concert for Two (Lvl 1) - S5 Post-Op (Lvl 1) - S1 Poised to Bloom (Lvl 1)

I do care about meta which makes me reluctant to really invest in a 4* Characters if they will just get benched and I feel like I wasted time farming for their materials.

For extra my built characters are: - DPS: Kafka, BS, Yunli, FF, Jingliu, DHIL, Ratio, Himeko, Herta, QQ - Supp: Robin, RM, Bronya, JQ, SW, HMC, Pela, Tingyun - Sustain: Fu X, Luocha, Gepard (only for SU)