Just meeting people know of a super easy and cheap way of getting to 375-400. Take 1 molten core which drop from CoF or you can just buy them of the tradty fort like 1.5 silver, then take 1 mithril ingot. It makes a rare sigil that gives you like 3 levels. You only need to make like 13 of then. I got from 375-400 for 15 silver. Hope this helps. Someone put it on wiki , I’m not good at that stuff.
Another effective way that I did it for even cheaper:
Buy the rare carrion mithril inscription, buy 15x bones, 6x mithril ingots, and 2x imbued dowels. Craft the carrion mithril greatsword (called krait something). There was tons of orders for 20s+ buyers and it cost about 21-22s to make.
