Hi Diane, welcome to LuLa :-)
I'm afraid the article you're puzzled by isn't the clearest bit of writing here and could do with some clarification. It also assumes that you're using a modern printer supplied with great profiles, but sadly not all printers are, even now. The article also seems to assume you've installed the full set of manufacturer's drivers that includes all their supplied profiles*, not everyone will have done that either.
From what I can understand, the idea behind the article is to go back to basics to fault find printing workflows.
1. The starting point is to use the manufacturer's own paper and profiles and default settings, applying the profile via the printer driver to get a base result.
2. Then make a print with the manufacturer's supplied profile applying it in your own software and leaving the printer driver not applying any profile at all.
3. Finally to build your profile or use some other custom profile, print with it and compare with the previous results.
The problem here is that some printer drivers allow more control than the article expects/mentions, as you've found out. So it's not clear what exact settings to use.
From what I can see the 'debugging process' goes in three stages;
In stage 1. You set your software to manage colour by printer and leave colour management to the driver defaults. In your case use Epson standard. (In the specific case of your driver you could also use ICM and select the correct profile* in the appropriate dialogue or you could also use Adobe RGB assuming your image is Adobe RGB).
In stage 2 you'd set the driver to OFF no colour management and apply the manufacturer's profile* in your printing software(Lightroom).
In theory 1 & 2 should give identical results.
In stage 3 you'd use the settings from stage 2, but apply a profile you were having issues with or build a new profile from scratch.
Frankly, anyone thinking of building their own profiles shouldn't need this kind of debugging help, but it may be useful for people having problems using non-standard profiles.
*Manufacturers can use some pretty cryptic naming on their profiles, so you may need to Google to find out which profile to use for your chosen paper.
Hope this helps