weapons
artefacts
Noblesse and Emblem are often the best, Noblesse being better than Emblem unless someone else on the team is running Noblesse
main stats and substats
main stats - hp%/ER% sands, HP% goblet, healing bonus/HP% circlet substats - hp, er, em, crit rate (with favonius)
notes - you do not want to build atk on his artefacts. Bennett's burst buff only skales with his base atk, artefacts don't impact that. only his level and weapon base atk does.
"what constellations are best?"
c1, c2, c6
"should I actually c6 my Bennett?"
absolutely! the only characters that would be negatively impacted by c6 Bennett don't want to use him (for example, Eula and Ayaka). otherwise, c6 Bennett either doesn't matter for your main dps or it directly buffs them.
- characters don't need Bennett Clorinde, Neuvillette, Alhaitham, Nilou, Cyno, Tighnari, Ayato, Yae Miko, Itto, Ayaka, Eula, Albedo
- characters where the infusion doesn't matter Navia, Wriothesley, Wanderer, Raiden, Xiao, Ganyu, Childe, Klee
- characters where the infusion is a buff Arlecchino, Lyney, Yoimiya, Hu Tao (mainly on Furina Xianyun teams), Diluc, Xiangling