I am not HC players but I post builds only able to handle sr90+ and all bosses at once in 75-76 deathless so it should definitely be viable for hardcore. I am not labeling it with HC tag only because I don’t play this mode.
Some of crucible’s speedruners builds should be viable for HC too but check if there were tested in high sr if you want to stay safe in 75-76 range or just stick to something like 50-51 or 65-66 or elite difficulty where drop rate is nice too.