You probably just want to get heal pots from f11 shop, put your 4 sou into that sword and armor to get them both to +3, so you can wear them both with 16 str. To survive until you get both pos from f11-14, put 2 or 3 sou into your evasion ring to boost your ehp. With t5 weapon and armor and chains, the caves boss should be a breeze, and you can snowball the run to ascension