Actually, just wanted to play another time and had an amazing run with only health and money rings!
I used a lot of items, so the 20% miracle with no items was a nice addition but nothing pivotal.
Got to rank 6 and kept getting 20 coins upon new rank, with the option to pump 30 gold into the fountain to get health up. The ring that gives 20% chance for health with 3 bullets in chamber was insane!
In the end I ended up brute-forcing through three consecutive gunshots to get back to empty's, with only a 20% for a miracle. So this is a fun way too, but a lot harder due to needing so much gold.