I looked at my playthrough (which I did over 5 years ago!) and here is what I did.
First of all, I attached a screen showing my stats at the beginning of the level. These are definitely not optimized, so there's plenty of room for improvement.
In my run I used the invisibility potion to get as soon as possible the long sword, this allowed me to be close to 150 ATK to one shot the swordman. The "
intended"
way was to use the invisibility potion for the bomb, but I don't think that's a good way to optimize.
Click here to view the secret text
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Before killing the tar mother I had these stats:
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HP: 5296
ATK: 151
DEF: 111
1 yellow key and 2 green keys
I cleared the first half of the level with these stats:
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HP: 1827
ATK: 160
DEF: 151
5 yellow keys and 2 green keys
After clearing a bit the outer part of the second half, I went back to the first half and got the bomb, which I then used to kill the wubba and get the wyrm smiter. So, I did not enter the last 4 inner rooms of the second half before getting the wyrm smiter.
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There's not some other world out there where everything's gonna be okay.
There's just this one, just this rock.
-33th Skywatcher