I was bored so I did a little bit of tracing to find the goblin HP.

Goblin HP is 2 bytes at offset 0x60011

If you look at this area of the ROM in a hex editor, it looks like a big table of enemy stats, with $10 bytes for each enemy. I did not verify that, though. Pretty much I stopped digging once I found the goblin HP.

I'll leave it to you to figure out the rest.