I looked at the recipe and here's what I imagine could turn it more stellar:
Quality ingredients.
I don't think you need to mull stellar wine, but the fresher your spices are the better it'd be.
I was just at Penzey's in Naperville today and I was quite "wowed" by the quality of their spices. I don't think the cloves I got from them are something the regular grocery store really carries, more like these were from the extra special clove place (I forget where).
I also am not sure why cinnamon sticks are called for. The best cinnamon is from softer bark and can't make sticks, only lumps.
Certainly if you can freshly grind your allspice and mace the recipe would improve.
Good oranges too, clementines are rampant, and Caputo's has Mandarin Oranges right now (nicer than clementines in my mind). Don't know if anywhere else has Mandarins (fresh, that is).
I have no idea about a quality lemon.
Quality to an extent in the wine. I'm sure it could be had for under
$10 a bottle. Recently went to Sam's Wine in Downer's Grove and asked for "5-10 dollar red wines with dark fruit character" and came home with a mixed case. Been loving every one.
Nancy