there is a good topic somewhere on here about lower lvls doing barrows. You are a higher lvl than me but i still think it will help. It helped me do my 1st barrows trip yesterday.
just made my 1st barrows run ( you dont have to completet nature spirit just started) i didnt get muhc abt 1.5k some chaos and deaths but i used 5 (4) p pots and it was fun im guna go agiain when i get mor p pots