Don't take unnecessary risks by fighting high level monsters too early.If you have to AFK, teleport back to town for safety. Don't leave the game unattended at any moment.The best option is to play on voice chat so you can call for help! Lags and disconnects happen, so be ready to save them at any moment. Watch your teammates’ HP and position in groups.That's what they're there for! (i.e Elixir of Death Evasion) Also, use Consumables such as Elixirs and Incense when you are up against challenging content. Refill your health potions when you run out by teleporting to town and talking to a Healer.Monitor your defensive buffs, especially those with conditional effects or short timers, and keep them up as much as possible in combat.Terrorized, Frozen, Chilling Wind, Waller, Mortar, Lightning Enchanted, Fire Enchanted, Plaguebearer).

Be aware of Elite Affixes that deal high damage or Crowd Control you (esp.Make sure you have enough Life to take some hits and if you are being followed by dangerous monsters, deal with them first before moving on. Engage new enemies only when you're ready.Think about how to leave if things go poorly (i.e. Be aware of all tools available to you like defensive cooldowns, Crowd Control effects, and your number of Health Potions. Do the same with all Renown Objectives and Altars of Lilith. Complete all the Dungeons that unlock important Codex of Power aspects as soon as possible for a big power spike and to get new characters going.Also save up some Gold and materials to upgrade your items. Keep it in your stash so that you can rush through the early levels quickly after a death. Save back-up gear, especially weapons, for various level requirements.

Make sure that the equipment you're using is adequate and upgraded as much as possible.

Include defensive choices in your build such as extra Armor, Life, Passives and Skills.

The benefits of playing on World Tier II do not always outweigh the greatly increased risk of dying and the frustration that comes with it. Consider first playing on World Tier I if you are brand new to Hardcore, new to a class, new to a build, or just new to Diablo 4 in general.

Diablo 3 best hardcore classes