Necromancer Palace is not that bad FR This is a guide I made because I was bored so take it with a grain of salt, your stat may vary from when I did necro palace but iirc I was lvl 116 ranged and 118 hp, this didnt matter that much since I was able to idle it easily.
Always run Damage_Reduction_Potion_IV and use prayers Battleborn and Holy_Aegis or run both Holy_Aegis and Stone_Skin if you do not have the balls to risk a few percentage of death in exchange for more dps (aka your just being a pussy)