Hmh... some random thoughts after my like 5th death in HC SSF with my Melee Blood Witch:
what were your SSFHC deaths? I always forget to abuse the Pause lol
My 1st one: Act 1 boss, before even the transition he can do a freeze trap while he summons adds
2nd: very embarrassing one against the Rust King early on (while playing a squishy Ranger)
3rd: Act 2 boss (sandstorm move, you are supposed to stand behind the girl and kill adds)
4th: Blackjaw in Act 3 (he has a infamous triple slam, I didn't know the third final slam has HUGE ranged AoE)
at least I'm having some progress through these deaths...