If you've already got absorption potion and are overloaded, The only boss that could end your life is corrupt lizardman RS Gold. You should disable him so he won't be able to take you down. There are also bosses who are difficult to take down, but must be in active mode as they can give you nice bonus points. If you're exhausted and would like to be able to play more easily in the dream, you should deactivate them.
If you are feeling that one of the bosses causes you too much trouble and you don't want to throw away your potions to fight him, make use of the Ultimate Force powerup. If you are not sure, avoid using it because it doesn't provide you with experience in exchange for killing. To achieve maximum amount of points and experience, players have to take on as many bosses as they can.
There are also bosses, such as Count Draynor, King Roald, Khazard War Lord, Tree Spirit, Moss Giant, Black Knight Titan, Ice Troll King, Black Demon,Witch The Experiment, Giant Roc, Treus Dayth, Nazastarool, Hellhound, Kendal, Ancient Skeleton and other dangerous foes.
Your list of items should consist of 8 prayer potions for 4-8 people, four overloads, one weapon with special attack orb and locator or rock cake. The rest of your inventory slots should have absorption potions. Upon entering the dream player is advised to drink overload and reduce the rest of the hitpoints down to 1 using wither locator orb and rock cake. This causes bosses to only hit for 1 and can be shielded for prolonged time due to absorption potions. If you are using equipment, take the best damage output set that you have (Dharok can be very effective).
There are many other useful gear items that will aid in battle : 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 more Buy RS 3 Gold. It is important to have potions like super magic Super ranging, super melee.