Inventory and gear. Rest of the free stock slots should be filled with absorption potions. Upon entering the RS gold fantasy participant must drink overload and eliminate remainder of the hitpoints down to 1 with wither locator orb or stone cake. This will make bosses to hit just for 1 which can be shielded for a very long time due to absorption potions. For the gear you should bring highest damage output set that you've got (Dharok will do the job really well).
Additionally, there Are numerous other powerful equipment Items Which can help you in conflict: Berserker Ring, Seers Ring, Archers Ring, Abyssal Whip, Salve Amulet, Warrior Rings, Void Knight Set, Ardougne Cloak, Anti Fire Shield, Proselyte Armour, God Book, Granite Maul, Amulet of Fury and many others. Make sure that you bring logos such as super magical, super ranging or super melee. Afk training. If you arrived to nightmare zone to rise your expertise on afk training this section is right for you.
To start off go to one of those corners at the fantasy so some of the bosses will not be able to reach you (remember you need melee only bosses for it to work). If you want to afk with regular overload / absorption combo keep in mind that these effects will last approximately 5 minutes. There is also way to grow that time to 20 minutes when using super combat potions instead of overloads. For people who wish to stay AFK even longer it is possible to fight bosses on easy mode with Guthan set for 20 minutes but it is not recommended since it wont give as much experience.
The most crucial part while training in nightmare zones is amassing points for both overload and absorption potions. You should be able to buy full inventory of these every single time you enter a dream. There is additional way of spending points if you're close to attaining cap. This should be used only once you are aware you have enough points for the next batch of potions.
Primarily from NMZ you can get imbuables. Player can imbue every fremennik and jungle ring to increase their stats two times. Black mask and Slayer helmet can be made better also adding to it 50% damage and accuracy boosts for magical and ranged too. Lastly it's likely to imbue crystal things to always keep their highest possible attack stats.
There is also special herb box which may be bought with points. Every one of these boxes contains various herbs and price 9500 points. Up to 15 boxes can be bought per day and every one of OSRS buy gold these contains herbs that worth approximately 10k gold. This adds up to complete 150k golden every single day.