Lel. I knew the idea sounded horrible and I even said it before but hardcore definition varies. Oh but hardcore DQ did exist when there was a TNT prop bug in 1.8 or 1.7 where if you died by TNT, you lose your character and cronos did tell me about this. I was glad I didn't play maps in those times.
I mean how to play DQ on a map that is very hard. Skyfall, immune enemies, enemy resist, 3+ bolts, tnt props , enemy affixes , packsize 100%+ . That's what I remember getting once and it was a very hard map even for my survival builds for floor climbing. If ignore resist, the resist and immune doesn't matter. With weaken high enough, immunes are dead but the resist gained can kind of matter (not too much though).