If You can make it through TTF on normal that should help.
I'd say sell items and use the money to feed your mag, it makes a huge difference.
maybe try hard mode around lvl 35 or 40? But a few more fights with bosses should make a huge difference.
P.S it's tedious, but you can normally pull off two hits and then run, for most enemies this is pretty fool proof, it might take a while to kill monsters, but it will allow you to fight things on hard mode.