I don't fish with tippets over 10 pounds. I usually fish 8 pounds in fact, and landed a 9.5 lb bone on that light a tippet last year. It's all about the touch you have with the fish and realizing when you can put more pressure on the fish and when you can't. The most frequent time you break a tippet is when you're trying to land the fish and there's not much line to stretch if the fish makes a lunge or they start to shake around, which means you just need to pay special attention when you land them.
My passion for catching fish is eclipsed only by the fish's passion not to be caught.