i easily run Dank Cellar on HC - if you died with really good geared character it had to be because of some lag or other server-side issue, meaning you'd die anyway even playing normally - welcome to online single player mode -.- already lost 2 HC characters this way -.-
If you're looking for 100% safe way the only one I can think of is Act 3 Chest - it's much much lower GPH (I get 75-100kGPH, while on Sarkoth 330k+), but theres simply no way you could possibly die

For A3 chest you can even buy crap gear only for +GF, as you can farm it having no DPS/resists/Vit etc
