It is all about experience and learning to use your tools which takes time. I can chase any chasable ring with a big debarking drawknife because I have used it for 26 years. I don't use it exclusively on tight rings, I take off enough wood to start seeing patches of the early wood and do the rest with a scraper very carefully.
On the tightest ring I ever chased I only used a scraper; it took me 8 hours to chase the ring from one end of the stave to the other. On these types of staves, I use a round nose scraper quite a bit, particularly around pin knot clusters and in valleys on the back.
Learning to put a proper sharp hook on your scraper is imperative. I have used a variety of things to roll the hook and used a screwdriver shank for years. A while back I bought a real scraper burnisher rod, this was daylight and dark compared to my screwdriver shanks, I can get a good hook very easily now.